Chlorofluorination
氯氟化(作用)
🗣️ 情景例句
There's Mother and Grandpa ...
有妈妈和祖父呢……
What's Hong Kong famous for?
香港以什么闻名？
All right. Just for a minute. I came to give you a message.
好！稍等一会儿。我来给你捎个口信。