Diffusion (vacuum)pump
[化] 扩散泵; 扩散真空泵
🧩 词语组成解析
🗣️ 情景例句
He has an old head on young shoulders.
他年轻又有见识。
Pleased to meet you.
认识你很高兴。
Really? If you are ill, you must see the doctor.
真的吗？如果是生病了，你得去看医生。