看到这个警示标志了吧？其实，如果仔细观察，您会在手边的易拉罐盒上、口香糖的包装上，看到“Do not litter”或者“No littering”等字样。

据报道，“五一”黄金周期间，北京城管部门严查随地吐痰、乱扔垃圾杂物等不文明行为。 

请看外电相关报答：Beijing has fined more than 50 people for spitting in the past week's holiday, a report said on Monday, as Beijing steps up a campaign to "civilize¹" the city before the 2008 Olympics.

Officials also handed out more than 10,000 bags to tourists to try to keep them from littering as inspection² teams fanned out across the city's tourist sites during the week-long Labor³ Day holiday, when hundreds of millions take to the roads.

报道中的“litter”指的就是“v. 乱扔垃圾杂物；n. 被胡乱扔掉的垃圾杂物”，此外，“litter”若做及物动词用时，宾语常为“（扔）的地方”，如：Do not litter the public beaches/tourist sites.（不要在公众游憩的海滩/旅游景点乱扔果皮纸屑。）

此外，报道中的“spit”指的是“随地吐痰”，而另一不文明行为“排队加塞儿”可用“to jump queues”来表达。