"Deep breathing city" in Engpsh can be translated as "respiratory city." This term does not appear to be widely used or have a specific, well-defined meaning. It is possible that you may have intended to ask about a different term or concept.
If you are interested in learning about deep breathing techniques or practices, "deep breathing" can refer to a type of breathing exercise that involves taking slow, controlled breaths in and out, often with the aim of reducing stress and promoting relaxation. This type of breathing can be done in any location, including a city, and does not necessarily have anything to do with the city itself.
Here are some example sentences and translations for "deep breathing":
"I always feel much calmer after a few minutes of deep breathing." (我每次深呼吸几分钟后都感觉非常平静。)
"The yoga instructor led us through a series of deep breathing exercises to help us relax." (瑜伽老师带我们做了一系列深呼吸练习，帮助我们放松。)
"One way to deal with anxiety is to practice deep breathing techniques." (应对焦虑的一种方法是练习深呼吸技巧。)