Variable(displacement)pump
[化] 变量泵
🗣️ 情景例句
A young female may be addressed as 'young lady'.
一个年轻的女性可以被称作 'young lady'。
Hello, it's really great to talk about ourselves and get to know each other.
大家好，我们自我介绍并相互认识真是太好了。
With a smile the man from downstairs said: I'm sorry to trouble you, comrade.
“对不起，打扰你了，同志。”