名词
中文翻译：反作用力
同义词：
['counteract', 'counterbalance', 'oppositional force例句：1. The counterforce of gravity is what keeps us from floating off the earth.（重力的反作用力使我们不至于飘离地球。）']
例句：
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1. The counterforce of gravity is what keeps us from floating off the earth.
重力的反作用力使我们不至于飘离地球。
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2. The counterforce of gravity is what keeps us from floating off the earth.
重力的反作用力使我们不至于飘离地球。
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3. The counterforce of gravity is what keeps us from floating off the earth.
重力的反作用力使我们不至于飘离地球。