The problem is a lot of this does not biodegrade.

他说：“问题是很多这种垃圾不能被生物降价。

youdao

Through PVA is excellent size, it is difficult to biodegrade and pollutes environment.

PVA虽上浆性能优良，但不易生物降解，严重污染环境。

youdao

Through PVA is excellent size, it is difficult to biodegrade and pollutes environment.

PVA虽上浆性能优良，但不易生物降解，严重污染环境。

youdao