Carcinotron
[电]回波管
🗣️ 情景例句
If negotiaton fails, then what?
万一谈判破裂，怎么办？
Has your company done any research in this field?
请问贵公司对此范畴做了任何研究吗？
Have they ever been there before?
他们以前去过那儿吗？