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

It is gradually formed and accumulated from a series of the idea of value conception, mode of behavior and culture mentality.

它由一整套价值观念、行为模式和文化心理积淀而成。

youdao

The education that students have, the environment the campus give and the special mental characteristic have made them get their own consumption mentality and consumption behavior.

大学生所受的教育、校园的环境以及该年龄特殊心理特征，使他们拥有自己特有的消费心理和消费行为。

youdao

The reason is simple enough: they discovered that they did not understand the Japanese market and, in particular, the mentality and behavior of Japanese individuals.

FORBES: Japanese Savers and the JGB Market