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As you start on the top and go down, your acceleration is negative.
当你在顶楼准备下降的时候,你的加速度是负的
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$firstVoiceSent
- 来自原声例句
As you start on the top and go down, your acceleration is negative.
当你在顶楼准备下降的时候,你的加速度是负的
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