coca 1-20200 english word,Image and sound

Rotor 12725.Rotor 英 Rəʊtə]美 Rotɚ 释义 N 电][机][动力

正面	12725.rotor 英 ['rəʊtə]美 ['rotɚ]
背面	释义： n. [电][机][动力] 转子；水平旋翼；旋转体 例句： 1. rotor blades on a helicopter直升机的旋翼叶片 1、re- "again" + fresh => refresh. rotor 机器转子，转动部件缩写自 rotator,来自 rotate,旋转，转动。引申词义机器转子，转动部件等。 rotor (n.)1873, irregular shortening of rotator (see rotate (v.)), originally in mathematics. Mechanical sense is attested from 1903; specifically of helicopters from 1930."

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