Borobutane
丁硼烷
🗣️ 情景例句
Oh, let's go upstairs and prepare Grandpa's room.
对了，我们上去准备一下爷爷的房间。
No matter what the excuse, you must not be late.
不管有什么借口，你一定不要迟到。
There was only one problem: the man upstairs.
住在楼上的人。