I thought if I'm going to understand dinosaur evolution, I'd have to go back to those beds where they had picked up fragments, go back to a time and a place where the earliest dinosaurs existed.
我想如果我要去了解恐龙是怎样进化的， 我不得不回到那些远古地层， 因为古生物学家在那里发现了恐龙的碎片，那是恐龙 曾经生活过的时代和地方。