The public place would be dirty if everyone dropped rubbish there.

如果每个人都扔垃圾，公共场所就会很脏。

youdao

Visionaries see a future in which things like household rubbish and pig slurry will provide the fuel for cars and homes, doing away with the need for dirty fossil fuels.

有识之士预见，未来家庭垃圾和畜猪粪便能为汽车及家庭提供燃料，免去了使用肮脏的化石燃料之累。

youdao

We can usually see that there are some people spit, throw rubbish, and speak dirty words in public.

我们经常可以看到有人在公共场所随地吐痰，乱扔垃圾，说脏话。

youdao

Visionaries see a future in which things like household rubbish and pig slurry will provide the fuel for cars and homes, doing away with the need for dirty fossil fuels.

ECONOMIST: Talking rubbish