我们学校旁边有一条小。
There is a small river next to our school.
以前小很脏，水也不。
In the past the little river was very dirty, and the water wasn't clean.
老师告诉我们要花和树。
Our teacher told us we must take care of the flowers and trees.
现在同学们都不在边东西了。
Now the students no longer throw things by the riverside.
山上的草和花都很漂亮，也很好。
The grass and flowers on the mountain are very beautiful, and the air is very fresh.
很，大家都帮忙。
Protecting the environment is very important, and everyone should help.