B. b. b.
[医] 血脑障壁
🗣️ 情景例句
It's not easy, but what is?
这不容易， 但什么事又容易了？
A bird may be known by its song.
什么鸟唱什么歌。
I stopped and he asked me for a lift.
我把车停下，他向我提出要求搭车。