B. u.
[医] 棱底向上
🧩 词语组成解析
[医] 单位
🗣️ 情景例句
You'll sleep sounder for it.
你会因此而睡得更加酣畅。
Edward had heard of the famous singer from Europe.
爱德华曾听说过欧洲出身的著名歌星的事。
No, we're just getting a lot of material stock piled.
没什么问题，只库存材料太多了。