Perhalogeno-
[化] 全卤(代)(代替所有C上的氢)
🗣️ 情景例句
We have a baby now.
我们现在有一个小宝宝了。
I'm going to be sixty-one next Tuesday.
下星期二我将60岁了。
After lunch Aunt Huang came in and she looked worried.
午饭后黄阿姨来了，她面带愁容。