Aggressin
[医] 攻击素
🗣️ 情景例句
Huh.
哦。
My brother wants to learn how to fly a plane.
我的兄弟要去学开飞机。
It seems that man was making a real effort to understand the seasons 20,000 years earlier than has been supposed.
看来人类早就致力于探索四季变迁了，比人们想像的要早20，000年。