Group 1
accuracy
准确性
concept
观念，概念
comprehend
理解
express
表达
fluency
流利
language barrier
语言障碍
mother tongue
母语
clarify
阐明
native speaker
说母语的人
sign language
手语
conjecture
推测
incoherent
语无伦次的，不连贯的
demonstrate
证明，展示
evolve
进化，发展
confirm
确认
inherent
定义
固有的；与生俱来的
define
have a say
翻译
有发言权
translate
that is to say
发音
也就是说
pronounce
needless to say
区分
不用说
distinguish
means of communication
犹豫
沟通方式
hesitation
when all is said and done
说到底；归根结底
having said that
话虽如此
there is something to be said for
有好处
to say the least
至少可以这么说
you can say that again
说得对