Cascade rotary pump
[化] 级联泵
🧩 词语组成解析
pump
[pʌmp]
n. 抽水机;打气筒;泵;轻软舞鞋;
v. 用泵输送 ;涌出;急速摇晃;盘问;
🗣️ 情景例句
I really want to go back to work,
我真的想回去工作，
How old are you?
你多大了？
This may be illustrated by comparing the position of a nation with that of a private business enterprise.
把国家的状况同私人企业的状况加以比较，就可以看清这个问题。