Pentabromoethane
五溴乙烷
🗣️ 情景例句
It's nice meeting you.
很高兴认识你。
You agreed that we could make a little change in design if necessary.
可你们曾经答应这，如有必要，图案可以稍作改动。
He told me to unpack my things and then come down to dinner.
他让我打开行装后下楼吃饭。