As chimney sweepers, come to dust.

全都像扫烟囱的人一样，归于尘土。

We are not respected by anyone because we are sweepers.

没有人尊重我们，因为，我们是扫街的。

The sweepers were training the brooms along the street.

清洁工们正沿着这条街道清扫。

Also, they have mechanical sweepers that come around every week.

同时，他们也派清扫机每周来这儿清扫。

The cache expiration, and also the sweepers, work in an identical way.

缓存到期失效以及清理器的工作方式也应该相同。