你还应该记得说话时要微笑，并使用友好的语气。

You should also remember to smile as you speak, and use a friendly tone.

youdao

如果你看到他的脸，这样就会使你要微笑。

'If you see his face it would just make you want to smile.

youdao

无论何时，总是要微笑与客人和同事问候(无论前台或后台)。

To greet with a smile at all times to colleagues or guests anywhere in the hotel (front or back of the house).

youdao

If you try to imagine a smile with no body at all, it can't be done. Why?

如果你要相信一个没有身体的微笑,那是根本做不到的 为什么呢

耶鲁公开课 - 死亡课程节选

So, if you smile at somebody, and you just hate their guts but you want to smile at them, it's--unless you're quite gifted it's difficult to fake a really good, really happy smile.

所以，你对某人微笑，你很讨厌他们，但你要对他们微笑，除非你很有天赋,很难去假笑，伪装真正的微笑。

耶鲁公开课 - 心理学导论课程节选