由于这些系统的机械原理不同，驾驶员可以自主选择是否通过换档来实现变速。
While the mechanics of these systems are different, the driver gets to choose whether to shift the gears, or not.
这个表达出自于机器或者齿轮会由于齿轮的改变而改变速度的原理。以上就是英语一分钟的内容。
This expression is based on the idea that a machine or vehicle will change speed when you change the gears. And that's English in a minute.
本文从离心泵变速调节原理入手，探讨了以节能为目标的离心泵变速调节的计算方法和效果。
Based on principle in speed regulation of centrifugal pump, method of speed regulation calculation for energy saving and its effects have been studied.
应用推荐