When people pour old motor oil on the ground or throw it in the garbage, it pollutes the environment.

当人们把旧机油倒在地上或扔到垃圾里，它会污染环境。

youdao

When people pour old motor oil on the ground or throw it in the garbage, it pollutes the environment.

当人们把旧机油倒在地上或扔到垃圾里，它会污染环境。

youdao