Problems must first of all be recognized.这里first of all为什么是插

Problems must first of all be recognized.这里first of all为什么是插 翻译英语Problems must first of all be recognized. problem must first of all be recognized and the right answer reader must,first of all, first of all这里first是个什么词? Work must come first能写成wor must come first of all么.first of first of all翻译 first at first above all first of all的区别 first of all first the first at first的区别 what ___ a good translation?First of all,it must be true to first of all等于什么 first of all,find out()