资料来源 : pyDict

最后,终於;详细地,充分地

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

Length \Length\ (l[e^]ngth), n. [OE. lengthe, AS. leng[eth], fr.
   lang, long, long; akin to D. lengte, Dan. l[ae]ngde, Sw.
   l["a]ngd, Icel. lengd. See {Long}, a. ]
   1. The longest, or longer, dimension of any object, in
      distinction from breadth or width; extent of anything from
      end to end; the longest line which can be drawn through a
      body, parallel to its sides; as, the length of a church,
      or of a ship; the length of a rope or line.

   2. A portion of space or of time considered as measured by
      its length; -- often in the plural.

            Large lengths of seas and shores.     --Shak.

            The future but a length behind the past. --Dryden.

   3. The quality or state of being long, in space or time;
      extent; duration; as, some sea birds are remarkable for
      the length of their wings; he was tired by the length of
      the sermon, and the length of his walk.

   4. A single piece or subdivision of a series, or of a number
      of long pieces which may be connected together; as, a
      length of pipe; a length of fence.

   5. Detail or amplification; unfolding; continuance as, to
      pursue a subject to a great length.

            May Heaven, great monarch, still augment your bliss
            With length of days, and every day like this.
                                                  --Dryden.

   6. Distance.[Obs.]

            He had marched to the length of Exeter. --Clarendon.

   {At length}.
      (a) At or in the full extent; without abbreviation; as,
          let the name be inserted at length.
      (b) At the end or conclusion; after a long period. See
          Syn. of At last, under {Last}.

   {At arm's length}. See under {Arm}.

At \At\, prep. [AS. [ae]t; akin to OHG. az, Goth., OS., & Icel.
   at, Sw. [*a]t, Dan. & L. ad.]
   Primarily, this word expresses the relations of presence,
   nearness in place or time, or direction toward; as, at the
   ninth hour; at the house; to aim at a mark. It is less
   definite than in or on; at the house may be in or near the
   house. From this original import are derived all the various
   uses of at. It expresses: 

   1. A relation of proximity to, or of presence in or on,
      something; as, at the door; at your shop; at home; at
      school; at hand; at sea and on land.

   2. The relation of some state or condition; as, at war; at
      peace; at ease; at your service; at fault; at liberty; at
      risk; at disadvantage.

   3. The relation of some employment or action; occupied with;
      as, at engraving; at husbandry; at play; at work; at meat
      (eating); except at puns.

   4. The relation of a point or position in a series, or of
      degree, rate, or value; as, with the thermometer at
      80[deg]; goods sold at a cheap price; a country estimated
      at 10,000 square miles; life is short at the longest.

   5. The relations of time, age, or order; as, at ten o'clock;
      at twenty-one; at once; at first.

   6. The relations of source, occasion, reason, consequence, or
      effect; as, at the sight; at this news; merry at anything;
      at this declaration; at his command; to demand, require,
      receive, deserve, endure at your hands.

   7. Relation of direction toward an object or end; as, look at
      it; to point at one; to aim at a mark; to throw, strike,
      shoot, wink, mock, laugh at any one.

   {At all}, {At home}, {At large}, {At last}, {At length}, {At
   once}, etc. See under {All}, {Home}, {Large}, {Last} (phrase
      and syn.), {Length}, {Once}, etc.

   {At it}, busily or actively engaged.

   {At least}. See {Least} and {However}.

   {At one}. See {At one}, in the Vocabulary.

   Syn: {In}, {At}.

   Usage: When reference to the interior of any place is made
          prominent in is used. It is used before the names of
          countries and cities (esp. large cities); as, we live
          in America, in New York, in the South. At is commonly
          employed before names of houses, institutions,
          villages, and small places; as, Milton was educated at
          Christ's College; money taken in at the Customhouse; I
          saw him at the jeweler's; we live at Beachville. At
          may be used before the name of a city when it is
          regarded as a mere point of locality. ``An English
          king was crowned at Paris.'' --Macaulay. ``Jean
          Jacques Rousseau was born at Geneva, June, 28, 1712.''
          --J. Morley. In regard to time, we say at the hour, on
          the day, in the year; as, at 9 o'clock, on the morning
          of July 5th, in the year 1775.

资料来源 : WordNet®

at length
     adv 1: after a long period of time or an especially long delay; "at
            length they arrived" [syn: {finally}, {eventually}]
     2: in a lengthy or prolix manner; "the argument went on
        lengthily"; "she talked at length about the problem" [syn:
         {lengthily}]