Diffusion (vacuum)pump
[化] 扩散泵; 扩散真空泵
🧩 词语组成解析
🗣️ 情景例句
Oh, how do you do, Xiao Fu. This is Mary.
哦，你好，小付。我是Mary。
He who likes borrowing dislikes paying.
爱借钱者不爱还钱。
He's not in his office at the moment.
他现在不在办公室里，