oil switch lamp

例句：

1. 1. Theoil switch lamp was the only source oflight in the dark room.
   在黑暗的房间中，油开关灯是唯一的光源。
2. 2.The oil switch lamp was easy to operateand had a long lifespan.
   油开关灯易于操作且使用寿命长。
3. 3. Theoil switch lamp was designedto be energy efficient and costeffective.
   油开关灯设计用于节能和成本效益高。