Variable(displacement)pump
[化] 变量泵
🗣️ 情景例句
Yes,
是的，
His controversial speech caused a wild discussion.
他们有争议的讲话引起了一场广泛的讨论。
The purpose of my coming here is to inquire about possibilities of establishing trade relations with your company.
我此行的目的正是想探询与贵公司建立贸易关系的可能性。