mass point的用法和樣例:
例句
- A particle has no extent so that its position is a point.
質(zhì)點(diǎn)沒(méi)有廣度因此它的位置是一個(gè)點(diǎn)。 - One instance of simple harmonic motion is that of the projection on any diametre of a point which describes a circular path with uniform angular velocity.
當一質(zhì)點(diǎn)以勻角速度作圓周運動(dòng)時(shí),則它在任意直徑上的投影的運動(dòng)便是簡(jiǎn)諧運動(dòng)的一例。