Diffusion (vacuum)pump
[化] 扩散泵; 扩散真空泵
🧩 词语组成解析
🗣️ 情景例句
to meet the rest of the troop at two o'clock at the museum.
我们得在两点钟到博物馆与其他童子军会合。
I've got to be going now, Good-bye.
我得走了，再见。
We need them urgently.
我们急需这些资料。