Dibromodifluormethane
[建] 二溴二氟甲烷
🗣️ 情景例句
How many classes are you taking this semester?
这学期你有多少课？
He came to give us a talk yesterday.
他昨天给我们作了一次演讲。
I had come ten miles since leaving the town,
从小镇出来，我走了10英里。