Clide
放射性核素浓度
🗣️ 情景例句
We looked at a lot of houses.
我们看了好多房子。
Why are you looking at me?
你为什么看着我？
I'm very sorry, comrade, said the man. I won't do it again.
“很对不起，同志，”楼上人说，“我不会再这么做了。”