机械利益

例句：

1. 1. The machine is designed to perform a specific task.
   这台机器被设计来执行特定的任务。
2. 2. Mechanical engineers are responsible for designing and building machines.
   机械工程师负责设计和建造机器。
3. 3. Mechanical systems can be complex and require specialized knowledge to operate correctly.
   机械系统可能很复杂，需要专门的知识才能正确操作。