Dodigen
石油工业用的一种缓蚀剂
🗣️ 情景例句
This spring is the origin of the brook.
这泉水是那条小河的源头。
Do you have a passport?
你有护照吗？
There is so much variety that you never have to make do with second best.
物品种繁多，从来不必用二等品来凑合。