Collisional diffusion
[电] 碰撞扩散
🧩 词语组成解析
a. 碰撞引起的
🗣️ 情景例句
and they found it to be too easy--
他们发现字太简单了，
I hope you get there on time.
我希望你准时到那里。
Why was that?
为什么呢？