watch oil

例句：

1. 1.He always takes a bottle of oil for his watch when he goes out.
   他每次出门都会带一瓶油给他的手表。
2. 2.The watch oil is very expensive, but it lasts longer than other brands.
   这款手表油价格昂贵，但比其他品牌更耐用。
3. 3.I need to change the watch oil in my watch before it stops working properly.
   我需要更换手表的机油，否则它会停止正常工作。