retraction
英[ri'trækʃən]美[ri'trækʃən]
n. 缩进,取消,撤回
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- minimum flap retraction speed
最低襟翼收起速度 收藏 - The careless, half-humorous shrug thus hears a visual affinity to the nod or bow of submissiveness and also to a turtle's retraction of its head into its shell.
因此，漫不经心、略带幽默的耸肩看起来和点头表示顺从有些想象，也好像乌龟把头缩进壳里的动作。 收藏 - The laws of retraction and reflection that govern the transmission of light also pertain to sound waves
光的传播所遵循的反射定律和折射定律同样适用于声波。收藏 - Retraction of forwarded ejector either by timer or door closing
由定时器或关门控制向前顶出收藏
开心词场背单词
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