If no people clean streets and take the rubbish away, terrible diseases will soon appear and spread easily.
如果没有人打扫街道，把垃圾带走，可怕的疾病很快就会出现并且很容易传播。
Rubbish will hurt the environment and take away from the park's natural beauty.
垃圾会破坏环境，破坏公园的自然美。
First, we need to have the idea that no rubbish being leaved behind when we leave the site. We should take away what we bring, keep the environment clean.
第一，文明需要有这样的观念，当我们离开景点时，不能留下垃圾，拿走带来的一切。
First, we need to have the idea that no rubbish being leaved behind when we leave the site. We should take away what we bring, keep the environment clean.
第一，文明需要有这样的观念，当我们离开景点时，不能留下垃圾，拿走带来的一切。
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