A good means to solve the waste pollution problem of city is to build rubbish disposal pit to pile them.

建造垃圾坑堆放垃圾是解决城市垃圾污染问题的一个有效方法。

youdao

A good means to solve the waste pollution problem of city is to build rubbish disposal pit to pile them.

建造垃圾坑堆放垃圾是解决城市垃圾污染问题的一个有效方法。

youdao