Biotoxin
生体毒素
🗣️ 情景例句
I care.
我关心。
A good book is a best friend who never turns his back upon us.
一本好书，莫逆之交。
If we could actually see the path described by a particle,such as a sand grain in the rock,
假如我们真能看到的运动轨迹，诸如岩石中一个沙粒分子