It is a basic emotion with a characteristic facial expression.

这是很基本的一种情绪,还伴有特定的面部表情。

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you'll see he's putting a bit of facial hair and look like just got out of the bed,

你会看到他留点胡须，看起来像刚起床一样，

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This is from a Japanese women facial expressions.

这是日本女性的面部表情。

耶鲁公开课 - 心理学导论课程节选

It has a distinctive facial expression again.

又一次有了与众不同的面部表情。

耶鲁公开课 - 心理学导论课程节选

First, I want to talk a little bit about facial expressions, which are ways in which we communicate our emotions not the only way, but an important way and look, in particular, at the case of smiling because it's kind of interesting.

首先，我要讲一点面部表情，这是我们在情感中的交流方式,不是唯一方式，但是重要的方式,看，特别是，拿微笑为例,这有点有趣。

耶鲁公开课 - 心理学导论课程节选