B. u.
[医] 棱底向上
🧩 词语组成解析
[医] 单位
🗣️ 情景例句
Just because the other kids have motor scooters is no reason for you to stop riding your bike to school.
只是因为其他的孩子都有电单车上学，不足以成为你不骑车上学的理由。
May I ask you where you are from?
我能问你从哪里来吗？
You have my word!
我保证！