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1·They will show these works of art to remind people not to leave rubbish when climbing the mountain.

他们将展示这些艺术作品，以提醒人们在登山时不要留下垃圾。

2·Sometimes rock climbers leave rubbish on the mountains which they climb.

有时攀岩者会把垃圾留在他们所攀登的山上。

3·Don't leave rubbish, please.

请不要乱扔垃圾。

4·They tell people not to leave rubbish.

他们告诉人们不要丢垃圾。

5·We shouldn't leave rubbish here and there.

我们不应该在这里和那里留下垃圾。

6·We shouldn't leave rubbish here and there.

我们不应该把垃圾扔在这里和那里。

7·People cut down too many trees and leave rubbish everywhere.

人们砍伐很多的树木、到处乱扔垃圾。

8·Don't climb the trees! Don't leave rubbish! Don't throw stones!

不要爬树！不要乱扔拉圾！不要乱扔石头！

9·We shouldn't leave rubbish everywhere and spit in public places.

我们不应该在任何地方扔垃圾和在公共场所随地吐痰。

10·We shouldn't leave rubbish everywhere and spit in public places.

我们不应该到处乱扔垃圾和随地吐痰在公共场所。