Polyiodocarbon
多碘烃
🗣️ 情景例句
How did you feel about being away
对出外工作作何感觉
It's a matter of life and death.
事关生死。
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支笔拴在重物上，笔尖落在地板上的一张纸上，