Millisievert
(mSv)毫西弗特
🗣️ 情景例句
We need a new coffee-table book,
我们需要一本可以摆在客厅的书，
But last year we had a big one.
但去年下了大雪。
What's that, Jim? Is it a picture?
吉姆，那是什么？一张照片？