1. This switch controls the number of rotations per minute. 这个开关控制着每分钟的转数。
2. Some movements involving primarily vertical or horizontal motions of the body as a whole, in which rotations can be ignored, can be studied using simple equations of linear motion in three dimensions. 有些运动主要涉及整体的垂直或水平运动,其中转动可以忽略,可以用三维线性运动的简单方程来研究。
3. Break the wire or... Ten rotations? 把吊绳弄断还是…,10转?