package unit

例句：

1. 1. The package unit is designed to fit snugly into the box.
   这个包装单位设计得能紧密地放入盒子里。
2. 2.The company uses a variety of packaging units to ensure product safety.
   该公司使用多种包装单位来确保产品的安全性。
3. 3. The new packaging unit has been tested and proven to be more efficient than the old one.
   新的包装单元已经测试过，证明比旧的更高效。