Some things are annoying, but also must smile.

有些事很烦，但还必须得强颜欢笑。

youdao

Time of seeing in mirror, must smile, say with oneself, I am lovely.

照镜子的时候，一定要微笑，跟自己说，我很可爱。

youdao

His father might disinherit him, America might sink, but she must smile again.

他的父亲可以剥夺他继承权，美国也可以沉没，但她一定得再次微笑起来了。

youdao

Even though we have a noun, the smile, that if you're not careful might lull you into thinking there must be a thing, the smile.

即使我们有笑容这个名词,如果你不够谨慎,可能会想当然地认为,一定存在着笑容这一事物

耶鲁公开课 - 死亡课程节选

Everyone offers a welcome and a handshake - a respectful smile which must be returned with like respect.

BBC: (Mis)reporting Sudan's famine