"To stay healthy, it's important to quit smoking" 是一句常见的表达方式。其中 "quit smoking" 是动词短语，意思是 "停止吸烟"。

这句话的来源是人们对吸烟对健康的认识。吸烟会对身体造成很多有害影响，包括增加患癌症、心脏病和呼吸系统疾病的风险。为了保护自己的健康，人们应该尽量减少或戒烟。

下面是一些例句：

I'm trying to quit smoking for the sake of my health. 我正在努力戒烟，为了身体健康。
Smoking is bad for your health. You should really try to quit. 吸烟对你的健康不好。你应该真的尽力戒烟。
It's never too late to quit smoking and improve your health. 戒烟并改善你的健康永远不晚。
Quitting smoking can be difficult, but the benefits to your health are worth it. 戒烟可能困难，但对你的健康的好处是值得的。