apron

他系着围裙在花园里干活。

He is working in the garden wearing an ___apron.

服务员在端菜前系上了围裙。

The waiter put on his ___apron before serving the dishes.

维修工在检查发动机前，先铺好了防护罩。

The mechanic laid out the ___apron before inspecting the engine.