你不能在街上扔垃圾。

You mustn't throw rubbish in the street.

不要随便在路上扔垃圾。

Don't throw rubbish onto the road.

他们还扔垃圾到河流里。

They throw rubbish into rivers, too.

往窗外扔垃圾的人应该被罚款。

Those who throw rubbish out of windows should be fined.

我认为人们在往河里扔垃圾。

I think people are throwing litter into the river.

是的，但人们在往河里扔垃圾。

Yes, but people are throwing litter into the river.

停止向海里扔垃圾。

Stop putting rubbish into the sea.

扔垃圾是不文明的行为。

Dropping litter is an uncivilized behavior.

请不要在公园里扔垃圾。

Please do not drop litter in the park.

学校教育学生不要扔垃圾。

The school educates students not to drop litter.