资料来源 : pyDict

程度,坡度,前倾,倾斜,投掷,音高,树脂,沥青投,掷,向前倾跌,扎营

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Pitch \Pitch\, n. (Elec.)
   The distance between symmetrically arranged or corresponding
   parts of an armature, measured along a line, called the pitch
   line, drawn around its length. Sometimes half of this
   distance is called the pitch.

   {Pitch of poles} (Elec.), the distance between a pair of
      poles of opposite sign.

Pitch \Pitch\, v. t. [imp. & p. p. {Pitched}; p. pr. & vb. n.
   {Pitching}.] [See {Pitch}, n.]
   1. To cover over or smear with pitch. --Gen. vi. 14.

   2. Fig.: To darken; to blacken; to obscure.

            The welkin pitched with sullen could. --Addison.

Pitch \Pitch\, v. t. [OE. picchen; akin to E. pick, pike.]
   1. To throw, generally with a definite aim or purpose; to
      cast; to hurl; to toss; as, to pitch quoits; to pitch hay;
      to pitch a ball.

   2. To thrust or plant in the ground, as stakes or poles;
      hence, to fix firmly, as by means of poles; to establish;
      to arrange; as, to pitch a tent; to pitch a camp.

   3. To set, face, or pave with rubble or undressed stones, as
      an embankment or a roadway. --Knight.

   4. To fix or set the tone of; as, to pitch a tune.

   5. To set or fix, as a price or value. [Obs.] --Shak.

   {Pitched battle}, a general battle; a battle in which the
      hostile forces have fixed positions; -- in distinction
      from a skirmish.

   {To pitch into}, to attack; to assault; to abuse. [Slang]

Pitch \Pitch\, n. [OE. pich, AS. pic, L. pix; akin to Gr. ?.]
   1. A thick, black, lustrous, and sticky substance obtained by
      boiling down tar. It is used in calking the seams of
      ships; also in coating rope, canvas, wood, ironwork, etc.,
      to preserve them.

            He that toucheth pitch shall be defiled therewith.
                                                  --Ecclus.
                                                  xiii. 1.

   2. (Geol.) See {Pitchstone}.

   {Amboyna pitch}, the resin of {Dammara australis}. See
      {Kauri}.

   {Burgundy pitch}. See under {Burgundy}.

   {Canada pitch}, the resinous exudation of the hemlock tree
      ({Abies Canadensis}); hemlock gum.

   {Jew's pitch}, bitumen.

   {Mineral pitch}. See {Bitumen} and {Asphalt}.

   {Pitch coal} (Min.), bituminous coal.

   {Pitch peat} (Min.), a black homogeneous peat, with a waxy
      luster.

   {Pitch pine} (Bot.), any one of several species of pine,
      yielding pitch, esp. the {Pinus rigida} of North America.

Pitch \Pitch\, v. i.
   1. To fix or place a tent or temporary habitation; to encamp.
      ``Laban with his brethren pitched in the Mount of
      Gilead.'' --Gen. xxxi. 25.

   2. To light; to settle; to come to rest from flight.

            The tree whereon they [the bees] pitch. --Mortimer.

   3. To fix one's choise; -- with on or upon.

            Pitch upon the best course of life, and custom will
            render it the more easy.              --Tillotson.

   4. To plunge or fall; esp., to fall forward; to decline or
      slope; as, to pitch from a precipice; the vessel pitches
      in a heavy sea; the field pitches toward the east.

   {Pitch and pay}, an old aphorism which inculcates ready-money
      payment, or payment on delivery of goods. --Shak.

Pitch \Pitch\, n.
   1. A throw; a toss; a cast, as of something from the hand;
      as, a good pitch in quoits.

   {Pitch and toss}, a game played by tossing up a coin, and
      calling ``Heads or tails;'' hence:

   {To play pitch and toss with (anything)}, to be careless or
      trust to luck about it. ``To play pitch and toss with the
      property of the country.'' --G. Eliot.

   {Pitch farthing}. See {Chuck farthing}, under 5th {Chuck}.

   2. (Cricket) That point of the ground on which the ball
      pitches or lights when bowled.

   3. A point or peak; the extreme point or degree of elevation
      or depression; hence, a limit or bound.

            Driven headlong from the pitch of heaven, down Into
            this deep.                            --Milton.

            Enterprises of great pitch and moment. --Shak.

            To lowest pitch of abject fortune.    --Milton.

            He lived when learning was at its highest pitch.
                                                  --Addison.

            The exact pitch, or limits, where temperance ends.
                                                  --Sharp.

   4. Height; stature. [Obs.] --Hudibras.

   5. A descent; a fall; a thrusting down.

   6. The point where a declivity begins; hence, the declivity
      itself; a descending slope; the degree or rate of descent
      or slope; slant; as, a steep pitch in the road; the pitch
      of a roof.

   7. (Mus.) The relative acuteness or gravity of a tone,
      determined by the number of vibrations which produce it;
      the place of any tone upon a scale of high and low.

   Note: Musical tones with reference to absolute pitch, are
         named after the first seven letters of the alphabet;
         with reference to relative pitch, in a series of tones
         called the scale, they are called one, two, three,
         four, five, six, seven, eight. Eight is also one of a
         new scale an octave higher, as one is eight of a scale
         an octave lower.

   8. (Mining) The limit of ground set to a miner who receives a
      share of the ore taken out.

   9. (Mech.)
      (a) The distance from center to center of any two adjacent
          teeth of gearing, measured on the pitch line; --
          called also circular pitch.
      (b) The length, measured along the axis, of a complete
          turn of the thread of a screw, or of the helical lines
          of the blades of a screw propeller.
      (c) The distance between the centers of holes, as of rivet
          holes in boiler plates.

   {Concert pitch} (Mus.), the standard of pitch used by
      orchestras, as in concerts, etc.

   {Diametral pitch} (Gearing), the distance which bears the
      same relation to the pitch proper, or circular pitch, that
      the diameter of a circle bears to its circumference; it is
      sometimes described by the number expressing the quotient
      obtained by dividing the number of teeth in a wheel by the
      diameter of its pitch circle in inches; as, 4 pitch, 8
      pitch, etc.

   {Pitch chain}, a chain, as one made of metallic plates,
      adapted for working with a sprocket wheel.

   {Pitch line}, or {Pitch circle} (Gearing), an ideal line, in
      a toothed gear or rack, bearing such a relation to a
      corresponding line in another gear, with which the former
      works, that the two lines will have a common velocity as
      in rolling contact; it usually cuts the teeth at about the
      middle of their height, and, in a circular gear, is a
      circle concentric with the axis of the gear; the line, or
      circle, on which the pitch of teeth is measured.

   {Pitch of a roof} (Arch.), the inclination or slope of the
      sides expressed by the height in parts of the span; as,
      one half pitch; whole pitch; or by the height in parts of
      the half span, especially among engineers; or by degrees,
      as a pitch of 30[deg], of 45[deg], etc.; or by the rise
      and run, that is, the ratio of the height to the half
      span; as, a pitch of six rise to ten run. Equilateral
      pitch is where the two sloping sides with the span form an
      equilateral triangle.

   {Pitch of a plane} (Carp.), the slant of the cutting iron.

   {Pitch pipe}, a wind instrument used by choristers in
      regulating the pitch of a tune.

   {Pitch point} (Gearing), the point of contact of the pitch
      lines of two gears, or of a rack and pinion, which work
      together.

资料来源 : WordNet®

pitch
     n 1: the property of sound that varies with variation in the
          frequency of vibration
     2: (baseball) the throwing of a baseball by a pitcher to a
        batter [syn: {delivery}]
     3: a vendor's position (especially on the sidewalk); "he was
        employed to see that his paper's news pitches were not
        trespassed upon by rival vendors"
     4: promotion by means of an argument and demonstration [syn: {sales
        talk}, {sales pitch}]
     5: degree of deviation from a horizontal plane; "the roof had a
        steep pitch" [syn: {rake}, {slant}]
     6: any of various dark heavy viscid substances obtained as a
        residue [syn: {tar}]
     7: a high approach shot in golf [syn: {pitch shot}]
     8: an all-fours game in which the first card led is a trump
        [syn: {auction pitch}]
     9: abrupt up-and-down motion (as caused by a ship or other
        conveyance); "the pitching and tossing was quite exciting"
        [syn: {lurch}, {pitching}]
     10: the action or manner of throwing something; "his pitch fell
         short and his hat landed on the floor"

pitch
     v 1: throw or toss with a light motion; "flip me the beachball";
          "toss me newspaper" [syn: {flip}, {toss}, {sky}]
     2: move abruptly; "The ship suddenly lurched to the left" [syn:
         {lurch}, {shift}]
     3: fall or plunge forward; "She pitched over the railing of the
        balcony"
     4: set to a certain pitch; "He pitched his voice very low"
     5: sell or offer for sale from place to place [syn: {peddle}, {monger},
         {huckster}, {hawk}, {vend}]
     6: be at an angle; "The terrain sloped down" [syn: {slope}, {incline}]
     7: heel over; "The tower is tilting"; "The ceiling is slanting"
        [syn: {cant}, {cant over}, {tilt}, {slant}]
     8: erect and fasten; "pitch a tent" [syn: {set up}]
     9: throw or hurl from the mound to the batter, as in baseball;
        "The pitcher delivered the ball" [syn: {deliver}]
     10: hit (a golf ball) in a high arc with a backspin
     11: lead (a card) and establish the trump suit
     12: set the level or character of; "She pitched her speech to
         the teenagers in the audience" [syn: {gear}]