用英语（分别用一句话）解释lexical gap,semantic gap

用英语（分别用一句话）解释lexical gap,semantic gap what is lexical gap? semantic change用英语解释这个词 The gap between the rich and the poor中的gap可不可以用bigger来修饰 gap filling(gap filling) 用英语回答How can we deal with the gap between the poor and the r 有助于缩小代沟（gap）的距离 英语怎么说 什么是GAP? generation gap GAP怎么样 gap是什么意思 Gap是什么