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1·The sign No Littering shows that we mustn't throw rubbish in the park.

“禁止乱扔垃圾”的标志表明我们不能在公园里扔垃圾。

2·Please don't throw rubbish.

请不要扔垃圾。

3·Throw rubbish in the bin.

把垃圾扔到垃圾桶里。

4·Don't throw rubbish everywhere.

不要到处乱扔垃圾。

5·Throw rubbish in the bin, please.

请将垃圾投入垃圾桶。

6·Do you throw rubbish on the floor?

你把垃圾扔地上吗？

7·They throw rubbish into rivers, too.

他们还乱扔垃圾到河流理去。

8·They throw rubbish into rivers , too.

他们还乱扔垃圾到河流理去。

9·First, we can't throw rubbish everywhere.

首先，我们不能到处乱丢垃圾。

10·Do not throw rubbish casually is necessary.

随处乱扔垃圾是必须的。