side cap

例句：

1. 1. The car has a side cap that protects the engine from dust and debris.
   这辆车有一个侧面盖，可以保护发动机免受灰尘和碎片的侵害。
2. 2. The side cap on the laptop is designed to keep the keyboard clean.
   笔记本电脑侧面盖上的设计是为了让键盘保持清洁。
3. 3. The side cap on the phone case is made of sturdy plastic material.
   手机壳侧面盖上的材料是坚固的塑料。