相关单词近义词 first of all 首先, first 第一的to start with, 首先, initially 最初, at the outset 一开始, to begin with 首先, primarily 主要地, originally 原本, first off 首先, foremost 最重要的反义词lastly, 最后临近词firth, first, firstly mount, firstly current, firstly discovered, Firstly he was a father., Firstly let's learn about nouns., firstly occurring strong earthquake, firstly upsetting and lastly braking相似词first-wave, first-world problem, firstborn, firsthand, firth, fisc, fiscal, fiscal year, 返回 firstly