Pentabromide
五溴化物
🗣️ 情景例句
and I have a production meeting at four.
我四点钟有个生产会议。
What's your nationality?Are you American?
你的国籍是什么?你是美国人吗？
Sure, just drop in my office some time and pick them up.
没问题，什么时候到我办公室来拿都可以。