mechanical computer

例句：

1. 1. The machine is designed to be easy to operate.
   这台机器设计得易于操作。
2. 2. The mechanical engineers are responsible for designing and building the machines.
   机械工程师负责设计和建造机器。
3. 3. Mechanical engineering is a field of study that focuses on the design and construction of machines.
   机械工程是一门专注于设计和建造机器的学科。