He picked up a leaflet about care of the teeth.他拾起一张宣传保护牙齿的传单。
He was standing at the door of the theater, handing out leaflets.他站在剧院门口散发传单。
This leaflet contains your operation instructions.这份小册子有你需要的操作说明。

leaflet还可用作动词,意思是“(向…)散发传单”。例如:
He's been out leafleting.他一直出去散发传单。