done or working without something else coming in betweenhad firsthand knowledge of the events of that evening
had firsthand knowledge of the events of that evening
direct, immediate, primary, unmediated
clinical, empirical(also empiric)efficient, proximatehands-on
indirect, secondhand
in 1699
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。