The first wrongly assumes that the pterosaurs' hind feet resembled a bat's and could serve as hooks by which the animal could hang in preparation for flight.
第一个（假设）错误地认为翼龙的后脚类似于蝙蝠的后脚，可以作为钩子，用来挂起来准备飞行。
2
But we weren't entirely carefree, always keeping a wary eye on this seemingly dangerous animal, just thirty feet away.
但我们也不是百分百无忧无虑，总是小心翼翼地观察着这只看似危险的动物，他离我们只有三十英尺远。
3
Once hunted nearly to extinction, the blue whale is the largest animal to have ever lived, growing to around 27 meters (88.5 feet) long and weighing up to an astounding 120 tons.