Fepp
[医][=free erythrocyte protoporphyrin]游离红细胞原卟啉
🗣️ 情景例句
It's getting late.
时间不早了。
A colt you may break,but an old horse you never can.
小驹犹可练，老马最难驯。
Looking up I saw that we were surrounded by children in rags who were looking at us silently as we ate.
我抬头一看，发现我们被一群衣衫褴褛的小孩团团围住了，他们在默不作声地看着我们吃饭。