名词
中文翻译：倒退运动
同义词：
['retrograde motion', 'backwardmovement']
例句：
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1. The team's performance was a backward motioncompared to last year's.
与去年相比，球队的表现是倒退的。
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2. Thescientist made a backward motion in his experiment.
科学家在他的实验中做了一个倒退的动作。
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3. Thecar moved backward motion when it hit thewall.
汽车撞到墙上时后退了一段距离。