资料来源 : pyDict

发射,放射,发出,放出,排出

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

Emission \E*mis"sion\, n. [L. emissio: cf. F. ['e]mission. See
   {Emit}.]
   1. The act of sending or throwing out; the act of sending
      forth or putting into circulation; issue; as, the emission
      of light from the sun; the emission of heat from a fire;
      the emission of bank notes.

资料来源 : WordNet®

emission
     n 1: the act of emitting; causing to flow forth [syn: {emanation}]
     2: a substance that is emitted or released [syn: {discharge}]
     3: the release of electrons from parent atoms
     4: any of several bodily processes by which substances go out
        of the body; "the discharge of pus" [syn: {discharge}, {expelling}]
     5: the occurrence of a flow of water (as from a pipe)