My boss was once a street cleaner when he was young.

板轻时一度当过扫马路的清洁工。

A street cleaner found me. He put me into the truck.

一个马路清洁工发现了。他把放进了卡车上。

He hasn't been employed by anyone to do this -- he just claims he wants to keep the city's streets cleaner.

没有人雇佣他来这样做，他说他只是想让城市的街道更干净一些。