Pentabromide
五溴化物
🗣️ 情景例句
At 4, but I have to leave by 3:00 to get there on time.
四点，不过我三点必须离开，才能准时到那里。
I'm so sorry.
十分抱歉！
Bleriot set off half an hour later.
半小时后便正式出发了。