B. u.
[医] 棱底向上
🧩 词语组成解析
[医] 单位
🗣️ 情景例句
A real dilemma.
一个大伤脑筋的事。
Fire, water, and money are good servants, but bad masters.
水火金钱是忠仆，使用不当是祸首。
Bleriot had been making planes since 1905 and this was his lattes model.
布莱里奥从1905年起便开始研制飞机，“11号”飞机是他制作的最新型号。