客人到达后，跟客人有微笑，目光接触和问候(30秒内)。

Guest was acknowledged within 30 seconds of arrival with smile, eye contact and greeting.

youdao

到处有微笑着挥手致意的人，如果有一个国度能让你心醉，那一定就是这里了。

And always the waving and the smiling. Surely, if there was a country to steal your heart, this was it.

youdao

研究人员把相同的照片与一张女士的侧面照放在一起，这张女士照片有微笑和不微笑两种，其摆放的位置使她看起来好像正在看两张男士照片中的一张。

The researchers then showed the same faces alongside a third photo of a female face in profile, positioned so she was looking at one of them, and smiling – or not.

youdao

And there are some interesting discoveries people have made about smiles and about smiles and the emotions.

有一些有趣的发现,人们微笑，微笑与情感有关。

耶鲁公开课 - 心理学导论课程节选

Professor Paul Bloom: I don't know if that's--The question is, "Is there a difference between smiling with your teeth versus just your lips closed?"

我不知道是否，问题是，微笑露齿与不露齿有不同吗“

耶鲁公开课 - 心理学导论课程节选

There are actually quite a few different types of smiles that are different in interesting ways.

确实有不同的微笑种类,有很多不同的有趣的方式。

耶鲁公开课 - 心理学导论课程节选