built-in casing

例句：

1. 1.The new phone features a built-in casing that is both stylish and functional.
   这款新手机具有既时尚又实用的内置壳体。
2. 2. The engineer designed the device with an internal casing to protect the sensitive components.
   工程师设计了这款设备，内置壳体以保护敏感组件。
3. 3. The laptop comes with a built-in casing that provides extra protection against drops and scratches.
   这款笔记本电脑配备了内置壳体，可以提供额外的防摔和防刮保护。