fuel-tank cap

例句：

1. 1.The fuel tank cap is designed to keep the fuel from leaking out.
   燃料箱盖设计用来防止燃料泄漏。
2. 2. The mechanic replaced the fuel tank cap after the engine overheated.
   发动机过热后，技师更换了燃料箱盖。
3. 3. The fuel tank cap was removed to inspect the fuel level.
   为了检查燃料水平，移除了燃料箱盖。