mechanical treatment

例句：

1. 1. The machine is designed to make the work easier for us.
   这台机器的设计是为了让我们的工作变得更简单。
2. 2. Mechanical engineering is a field of study that focuses on designing and building machines.
   机械工程是一门专注于设计和建造机器的学科。
3. 3.The engineers used a mechanism to adjust the temperature of the air.
   工程师们使用了一种机制来调整空气的温度。