原声例句
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And then we have c, the speed of light, 2.998 times 10 to the 8 meters per second.
然后我们知道光速等于，2，998乘以10的8次方米每秒。
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If your plan is to accelerate a 3 kg mass with an acceleration of 2 meters per second, you better have a rope that can furnish that force and it can take the tension of 6 Newtons.
如果你想用 2 米每秒平方的加速度,去拉一个 3 千克的物体,那么你就需要一根能提供拉力的绳子,并且它能够承受 6 牛的张力
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