Variable(displacement)pump
[化] 变量泵
🗣️ 情景例句
It's your birthday.
今天是你的生日。
There is a phone booth in the corner.
在转角处有个电话亭。
Then he put his hand into pocket, and took out a phrasebook.
然后他把手伸进了衣袋，掏出了一本常用语手册。