All the animals, including man, have the same basic behavioral traits as our ancestors.

包括人类在内的所有动物都有和祖先一样的基本行为。

But rather, as particular traits came about from selective pressures, such as choosing wolves who were not afraid of humans, or ones that were less aggressive, over many generations we can see big genetic and behavioral trait differences.

但有些特殊的特质是来自选择压力，例如，选择不怕人或是较不具攻击性的狼好几代之后，我们可以观察到非常大的基因和行为特质差异。