Instead of going out and guessing about our ancestry, digging things up out of the ground, possible ancestors, and saying it on the basis of morphology -- which we still don't completely understand, we don't know the genetic causes underlying this morphological variation -- what we need to do is turn the problem on its head.
不是光靠出去满处挖掘， 猜想谁是你可能的祖先， 就靠着谁长得像， 更别提我们还不太明白怎么确定谁长得像呢。 因为我们并不完全理解基因变异怎么导致了形态的改变。 我们要做的是变被动为主动，