Perhalogenomethane
全卤甲烷
🗣️ 情景例句
Eight pounds six.
八磅六。
I told him to stay till he comes back.
我告诉他留下来等他回来。
of a change of atmosphere, of a diversion of effort, is essential.
改变一下气氛，转移一下注意力，这是不可缺少的。