Polychlorohydrocarbon
多氯代烃
🗣️ 情景例句
The security guard asked the stranger for some I.D.
保安要求陌生人出示身份证。
I deeply regret my thoughtlessness.
我深为反省自己的轻率。
Give her the key.She always comes home early.
。把钥匙给她吧。她总早早回家的。