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reciprocating 音标拼音: [rɪs'ɪprək ,etɪŋ] 前后转动 前後转动 Reciprocate \ Re* cip" ro* cate\ ( r[- e]* s[ i^] p" r[- o]* k[= a] t), v. i. [ imp. & p. p. { Reciprocated} ( r[- e]* s[ i^] p" r[- o]* k[= a]` t[ e^] d); p. pr. & vb. n. { Reciprocating}.] [ L. reciprocatus, p. p. of reciprocare. See { Reciprocal}.] To move forward and backward alternately; to recur in vicissitude; to act interchangeably; to alternate. [ 1913 Webster] One brawny smith the puffing bellows plies, And draws and blows reciprocating air. -- Dryden. [ 1913 Webster] { Reciprocating engine}, a steam, air, or gas engine, etc., in which the piston moves back and forth; -- in distinction from a rotary engine, in which the piston travels continuously in one direction in a circular path. { Reciprocating motion} ( Mech.), motion alternately backward and forward, or up and down, as of a piston rod. [ 1913 Webster]
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