R.b.c.
[医] 红细胞(旧名红血球)
🗣️ 情景例句
why don't you introduce everybody to Susan?
何不将她们每一位介绍给 Susan？
I'm not sure what time I'm coming back.
我不肯定我什么时间回来。
It was my first flight. I was nervous when the plane took off.
我第一次坐飞机，起飞时我有点紧张。