Caseidin
n. [生化]酪蛋白免疫素
🗣️ 情景例句
Very few people last in this class for the full hour the very first time.
很少人能够第一次撑完一个小时的课。
He irons sweaters every day.
他每天都烫衣服。
We often call him by his nickname.
我们经常叫他的绰号。