Oildag
石墨润滑剂, 胶体石墨
🗣️ 情景例句
we don't have to.
我们不必勉强。
My brother is not quite twenty-five.
我的兄弟不够25岁。
Really? They're rather a strong team, aren't they?
是吗？他们可是只强队，不是吗？