Inside were three men, aged in their early twenties.
2
那是因为大型生物的繁殖速度十分缓慢,所以只要除去象群中的几头年轻的母象,它们的数量就会大幅的下降。
That's because very large animals have a slow rate of reproduction, so all you have to do is remove a few young females from the herd, and you can, fairly quickly, significantly reduce the population.
3
他那头年老的狗就在灰烬里翻滚,使自己隐没在烟灰中。
His old dog rolls in the ash and cloaks itself in soot.