Pentafluorization
五氟化反应
🗣️ 情景例句
We have to work hard to get people interested in politics.
我们必须努力使人们对政治感兴趣。
At open doors dogs come in.
狗从开着的门中进来。
' Just then, the telephone rang.
”正在这时，电话铃响了。