droop v. 下垂,消沉 ，低垂, 凋萎, 萎靡 例句与用法: 1. The flowers were drooping for want of water. 这些花因缺水而凋萎。 2. Her head drooped sadly. 她悲哀地垂着头。 3. Abnormal lowering or drooping of an organ or a part, especially a drooping of the upper eyelid caused by muscle weakness or paralysis. 下垂一个器官或器官的一部分不正常的下降或垂落，尤其指由肌肉松弛或麻痹引起的上眼睑的下垂 例：Do not droop your head. 别垂头。drop :[drɔp] vt. 滴下,落下;使变弱,使下降vi. 滴下,落下;下降,变弱n. 落下,下降;滴,滴剂 例：1.Oh! I dropped my band - aid in the curry.哎呀!我把我的绷带掉在咖喱饭里了 2.Supplies were dropped by parachute. 供给物资用降落伞空投。 3.Dan drops in on us often. 丹经常来拜访我们。Voltage Drop：电压降例： Note the polarity of the voltage drop across R. 注意r上电压降的极性。voltage droop;电压下降
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