Millisievert
(mSv)毫西弗特
🗣️ 情景例句
Welcome aboard, Malcolm!
欢迎加入， Malcolm
To drive a delivery car
驾驶送货车
'Whatever are you doing up here Bill?' asked the vicar in surprise.
“你究竟在这上面干什么，比尔？”牧师惊讶地问。