For the past several decades, it seems there's been a general consensus on how to get ahead in America: Get a college education, find a reliable job, and buy your own home.
在过去的几十年里,人们对如何在美国取得成功似乎已经达成了一个普遍的共识:接受大学教育,找到一份可靠的工作,然后买一栋自己的房子。
It seems to vary enough, but not too much, to act as a reliable marker.
这种基因有它的变体,但变体不多,因此可以作为可靠的标记。
All animals have it. It seems to vary enough, but not too much, to act as a reliable marker.
所有动物都有这个基因;这种基因有它的变体,但变体不多,因此可以作为可靠的标记。
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