Unfortunately, with dinosaurs, we haven't had enough specimens to determine how much variation there is within a species.

Unfortunately, with dinosaurs, we haven't had enough specimens to determine how much variation there is within a species.

不幸的是，对于恐龙，我们没有足够的标本来确定一个物种内部有多少变异。

-- Jack Horner 杰克·霍纳