这位垃圾学家正在研究如何减少社区垃圾的产生。

The ___garbologist is researching ways to reduce waste production in the community.

我爸爸笑着说自己是位‘垃圾学专家’，因为他每天负责清理社区的垃圾桶。

My dad jokes that he's a ___garbologist because he collects trash for our neighborhood every day.