A.p.f.
[医] 动物蛋白因素
🗣️ 情景例句
No one knows for certain what happened, but it's a fair bet that it was not an accident.
没有人知道究竟发生了什么，但几乎可以肯定这并非意外。
I've always respected him.
我一直很尊敬他。
We'll wait and see what they say.
看看他们怎么说吧。