Pozzolan
n. 火山灰(可用作水泥原料)
??? 情景例句
I would like to lodge a complaint.
我有些怨言。
Crows do not pick crow's eyes.
同室不操戈。
A moment later, the Class 4 runner fell and hurt his leg, but he quickly got up and went on running.
過了一會(huì)兒，4班的運(yùn)動(dòng)員摔倒了，傷了腿，但是他很快爬起來，繼續(xù)往前跑。