If this is not done, the rotational momentum of the spool will cause it to remain in motion allowing yarn to be unwound without being taken up.
如果不能做到这一点,筒子的回转力矩会使它继续转动并退绕纱线,而退绕的纱线不能被卷绕到新卷装上。
A body at rest will remain at rest and a body in motion remain in motion at a constant speed in a straight line, unless acted upon by an external force.
一个婴儿在休息的时候就会静静地休息,然而他们在活动的时候就会沿着直线的方向匀速活动,除非有外力作用。
If a stock is set in motion, the trend will remain intact until it ends.
如果一个股票开始发动,这种趋势将保持不变,直到结束。
One way to say it is, every body will continue to remain in a state of rest or uniform motion in a straight line.
另外一种说法是,任何物体都会继续保持静止,或匀速直线运动的状态
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