rotational speed的用法和样例：
例句
- However, as spin speed is increased, the power required to overcome windage and bearing friction rises sharply.
但是，随着自转角速度的增加，克服风阻和轴承摩擦的功率急剧地提高。 - The result shows that during a fast flexion the short time average angular speed is nearly constant, but the instantaneous speed appears to be a fluctuation wave.
模拟结果表明，在快速屈曲过程中，食指短时平均角速度近似为匀速，瞬时角速度呈现阻尼振荡形式。
