Perchloropropane
八氯丙烷
🗣️ 情景例句
You think I can just skip it now and get to it at college?
你想我现在略过数学， 等到上了大学再学， 可以吗？
I feel guilty because I haven't written her lately.
因为我最近没给她写信，我感觉到有罪。
What was the population of the world in 1950?
1950年世界人口是多少？