Rida
[医][=radioisotope dilution assay]放射性同位素稀释测定
🗣️ 情景例句
Study hard and study everyday, if you want to master the English language.
如果你想精通英语的话，就得每天刻苦学习。
It's a long story.
说来话长。
I've come to make sure that your stay in Beijing is a pleasant one.
我特地为你们安排使你们在北京的逗留愉快。