That is to say, the three parts of the cities, workers, auxiliaries, guardians, each of them all work together and each by minding their own business, that is doing their own job, out of this a certain kind of peace and harmony will prevail.

也就是说，城市的三个部份，工人，后备军人及守护者，每人都紧密合作,且各司其职，只管他们自己的事，在此以外,特定的和平及和谐将照管一切。

耶鲁公开课 - 政治哲学导论课程节选

and if they want to sort of free ride on my work, that's their business

如果他们想从我的工作中占便宜，那是他们的事。

怎么协调意见冲突 - SpeakingMax英语口语达人

What kind of business do people prefer to work for in the UK?

在英国，人们喜欢做哪个领域的工作？

热门工作 - SpeakingMax英语口语达人