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So now we're going to turn off the lights and I want to show you the motion of the center of mass.
我们要关上灯,我想给你们展示,质量重心的运动。
youdao
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I even want you to show off the.
我连你给的敷衍都想去炫耀。
youdao
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I even you give the perfunctory want to show off.
我连你给的敷衍都想去炫耀。
youdao
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I even you give the perfunctory want to show off.
我连你给的敷衍都想去炫耀。
youdao