Oildag
石墨润滑剂, 胶体石墨
🗣️ 情景例句
A little further back, Tom.
再往后一点 Tom。
It's a beautiful country with many large lakes.
它是一个有许多大湖的美丽的国家。
He had a good many friends here.
他在这儿有很多朋友。