watch case

例句：

1. 1. The watch case is made of high-quality metal.
   这个手表外壳是用高质量的金属制成的。
2. 2. The watch case has a smooth surface and is easy to clean.
   这个手表外壳表面光滑，容易清洁。
3. 3.The watch case is designed to protect the watch from damage.
   这个手表外壳设计用来保护手表免受损坏。