B-m
abbr. 医学士（Bachelor of Medicine）；大英博物馆（British Museum）；巴比特合金，巴氏合金（Babbit Metal）；水平点，基准点（bench mark）
🗣️ 情景例句
Please don't do it without asking.
未经允许请不要那么做。
From which station does the train leave?
这列火车从哪个站开出呢？
There are many stars in the sky.
天上有很多星星。