He even saw dragonflies and damselflies mating and laying eggs—at a river that had not existed earlier that day.

他甚至看到蜻蜓在当天早些候不存在的流中交配产卵。

Within a few hours, Bogan counted seven different species of dragonflies. He even saw dragonflies and damselflies mating and laying eggs-at a river that had not existed earlier that day.

几小内，博根数出了七种不同种类的蜻蜓。他甚至看到蜻蜓流里交配产卵，这流当天早些候还不存在。