厨余垃圾应做到袋装、密闭好后再投放到绿色垃圾桶。

These <em>kitchen</em> <em>waste</em> should be sealed in bags and put into the green trash cans.

答：是的，他们帮助我们处理厨余垃圾。

A: Yes, they help us recycle leftovers.