components test unit

例句：

1. 1. The components of this system arecarefully designed to ensure optimal performance.
   这个系统的组件经过精心设计，以确保最佳性能。
2. 2. Thetest unit is crucial for verifying thereliability of the entire system.
   测试单元对于验证整个系统的稳定性至关重要。
3. 3. Theengineers spent several daystesting each component to ensure theyfunctioned correctly.
   工程师们花了几天时间测试每个组件，确保它们能够正确工作。