Caseidin
n. [生化]酪蛋白免疫素
🗣️ 情景例句
I don't know for sure.
我不太清楚。
Do you like playing cards?
你喜欢玩扑克？
During a bullfight, a drunk suddenly wandered into the middle of the ring.
在一次斗牛时，一个醉汉突然溜达到斗牛场中间，