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1·There will be fines for people who drop litter.

乱扔垃圾的人将被罚款。《牛津词典》

2·It was drilled into us at an early age never to drop litter.

我们从小就被叮嘱绝不能乱扔垃圾。《牛津词典》

3·Some parents are concerned that it encourages their children to drop litter so they can watch the birds pick it up.

一些家长担心这样会鼓励他们的孩子乱扔垃圾，因为这样他们就可以看到鸟儿捡垃圾了。

4·However, some parents are concerned that it encourages their children to drop litter so they can watch the birds pick it up.

然而，一些家长担心这样会鼓励他们的孩子乱扔垃圾，这样他们就可以看到鸟儿捡垃圾了。

5·I'm sure we'll make the town better if we don't drop litter.

我相信，如果我们不乱丢垃圾，我们会让小镇变得更好。

6·Do not drop litter carelessly.

不要粗心大意地扔垃圾。

7·Don't drop litter carelessly.

不要随便丢垃圾。

8·You can't drop litter carelessly.

你不能乱扔垃圾。

9·Don't drop litter here and there.

不要把垃圾扔得到处都是。

10·You can drop litter in the street.

你可以在街上丢垃圾。