Sigmatron
高能 X 射线仪, [核]西格马加速器
🗣️ 情景例句
I'm a foreign student, and I'd like to make some new friends.
我是个外国学生， 我想交几个新朋友。
When the light went out, I was cleaning the yard.
当熄灯的时候，我在清理庭院。
Do you have an appointment?
您约好了吗？