So very instinctive behavior — survival of the fittest — emerged, ” Torgler says.

所以非常本能的行为——‘适者生存’（survival of the fittest ）——才会发生，”托尔格勒说。

youdao

A yawn is an instinctive behavior: You don't have to learn to do it, and yawns are even present before birth.

打哈欠是人的本能行为：你不需要去学它，甚至在我们出生之前我们就已经学会打哈欠了。

youdao

It just happens — it's instinctive, and it's a very primal aspect of human behavior that goes back to ancient herd mentality.

是啊，会这样的——这是一种本能反应。追根溯源，打哈欠这一行为在远古时期就是人类最早的行为之一。

youdao

Now the question is whether or not companies can design their customer engagement around instinctive behavior that drives the ultimate result: increased sales and margins.

FORBES: Zara, Microsoft And GORE-TEX - Tapping Real-Time Instincts

These policies are designed around the instinctive human behavior of self-organization.

FORBES: Zara, Microsoft And GORE-TEX - Tapping Real-Time Instincts

He also is credited with reviving the field of animal behavior after discovering that both instinctive and learned behavior is necessary for long-term species survival.

NPR: American Wins Chemistry Nobel for DNA Work