regarding/rIˋgɑrdIŋ; rIˈɡɑːdIŋ/prep formal a word used especially in business letters to introduce the subject you are writing about【正式】关于﹐有关〔尤用于商业信函中引出事由〕: Regarding your recent inquiry, I’ve enclosed a copy of our new brochure. 关于您最近的询问﹐我已附上一份我们新的小册子。