Check alarm area equipment and environment cleaning state, if dirty, then report Eng Dept. to take actions.

检查报警区域的设备和环境清洁状况，如果存在脏物则通知工程部清洁处理。

youdao

So I went through the dark dirty streets and houses, and saw how the people suffered in this area.

VOA: special.2010.08.01

Experts say terrorist groups are seeking materials for a crude nuclear device - a so-called "dirty bomb" - that would have limited blast potential but could spread radiation in a major urban area.

VOA: standard.2010.04.11

Excerpt: A low, dirty cloudbank had been stalled over the metropolitan area for days, trapping the kind of temperatures and humidity normally associated with the Philippines.

FORBES: Fact and Comment

The new set-up would be a professional catering kitchen and designed so dirty dishes came in to be stacked, washed and dried, and then moved round to the preparation area where meals were made and served, he added.

BBC: Existing kitchen at Crawley Open House