all in a day's work idiom
日常工作的一部分；习以为常，不足为奇
If something difficult, unpleasant, or strange is all in a day's work for someone, it is a usual part of their job.
When you're a nurse, cleaning up vomit is all in a day's work. 对护士来说，打扫呕吐污物就是分内工作。