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

他甚至看到蜻蜓和豆娘早些候不一条河流中交配和产卵。

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蜻蜓。他甚至看到蜻蜓和豆娘河流里交配和产卵，这条河流早些候还不。