Cryopumping
冷凝排气; 低温排气
🗣️ 情景例句
Did everything go all right?
一切都顺利吧？
I've spoken English all my life.
我一辈子说英语。
I have just received a letter from my brother, Tim.
我刚刚收到弟弟蒂姆的来信，