Polychlorohydrocarbon
多氯代烃
🗣️ 情景例句
Many foreign friends used chopsticks when they visited China.
许多的外国朋友在访问中国的时候都使用筷子。
I'm taking a walk in the park.
我在公园散步。
He did not know from which part of Africa his ancestor had come.
他不知道祖先来自非洲的什么地方。