In the Galileo's times, the people still could not calculate the forthwith speed of variable motion's object.

在伽利略生活的年代，人们还不会计算作变速运动物体的即时速度。

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In the Galileo's times, the people still could not calculate the forthwith speed of variable motion's object.

在伽利略生活的年代，人们还不会计算作变速运动物体的即时速度。

youdao