adjust the speed

• 调节速度

adjust the speed的用法和样例：

例句

1. Pull the lever towards you to adjust the speed.
   把操纵杆向你身体一侧拉动以调节速度。
2. This paper introduces the fans principle and ways saving electricity by governing speed.
   介绍通风机通过调节速度节省电能的原理和方法。