电子、通信与自动控制技术
低频
The A.F.L.also opposed extremists who used labor protests to change the social system.
VOA : special.2010.05.06
Led by Samuel Gompers, the A.F.L.was different from earlier labor groups.
But no N.F.L.teams showed immediate interest in having him play.
VOA : special.2009.08.01
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。