Donutron
笼圈式谐振腔磁控管
🗣️ 情景例句
We are postponing our trip until the weather grows warmer.
我们拟把旅行推迟到天气暖和的一些时候。
May I introduce you to my friend Susan?
恕我介绍一下我的朋友苏珊。
The doctors removed a section of the mummy and sent it to a laboratory.
医生们从木乃伊身上取下一个切片，送去化验。