B. u.
[医] 棱底向上
🧩 词语组成解析
[医] 单位
🗣️ 情景例句
He takes things too seriously.
他看待事情太认真了。
What excuse could he have for being so rude?
他做了那样无理的事，将如何辩解呢？
These friendly dogs, which were first brought from Asia, were used as watchdogs even in Roman times.
那些最先从亚洲引进的狗，待人友好，早在罗马时代就给人当看门狗了。