B. u.
[医] 棱底向上
🧩 词语组成解析
[医] 单位
🗣️ 情景例句
Don't be so miserable!
别这愁眉苦脸的。
He was accustomed to poor food.
他习惯于粗茶淡饭。
I started to sing. The baby watched and listened ,and she didn't cry any more.
我开始唱歌。小孩看着，听着，不再哭了。