考研英语高频词汇barrier n.障碍 (物) ;壁垒历年真题考查频次:4次>真题复现1:I believe that the most important forces behind themassive M&A wave are the same that underlie the globalizatiorprocess: falling transportation and communication costs, loweltrade and investment barriers and enlarged markets that requireenlarged operations capable of meeting customer's demands(2001年text4P3)