Millisievert
(mSv)毫西弗特
🗣️ 情景例句
Have you ever done any work in this field?
你曾经干过这一行吗？
In books,are embalmed the greatest thoughts of all ages.
伟大思想古今有，载入书中成不朽。
The steps are rather narrow.
这些台阶相当窄。