Polychlorocarbon
[化] 多氯烃; 多氯代烃
🗣️ 情景例句
Don't be so grumpy.
别总这么爱抱怨。
Tom graduated from college at a very young age.
汤姆很年轻就从大学毕业了。
He may never be sure where the next meal is coming from, but his is free from the thousands of anxieties which afflict other people.
他可能从不知道下顿饭有无着落，但他不像有人那样被千万桩愁事所折磨。