Polyhalogenation
多卤化反应
🗣️ 情景例句
The private lives of celebrities take up more magazine space than world news.
名人的私生活在杂志上占的版面比国际新闻还要多。
Virtue is her (or its) own reward.
为善最乐。
I have just received a letter from my old school, informing me that my former headmaster,
我刚刚收到母校的一封信，通知我说以前的校长