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It felt strange to run and not feel his feet when they hit the ground.
VOA: special.2010.05.01
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When does it hit the ground and at what speed?"
该物体何时落地,落地速度是多少
耶鲁公开课 - 基础物理课程节选
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and you've got to hit a ball which is on the ground with a sort of croquet mallets.
你要用一个类似木槌的东西去打击地上的球。
知道马球吗? - SpeakingMax英语口语达人