大学四级高频单词短语（一）思维导图

be based on / upon 基于

on the basis of 根据…, 在…基础上

beat…at 在…运动项目上打赢

in brief(=in as few wordsas possible)简言之

in bulk 成批地，不散装的

take the floor 起立发言

on business 出差办事

be busy with sth  忙于某事

bebusy doing sth. 忙于做某事

last but one 倒数第二

be certain of (=be sureof) 有把握， 一定

for certain of (=for sure)肯定地，有把握地

by chance(=accidentally,by accident)偶然

attach(to) (=to fix,fasten; join) 缚， 系 ,结

make an attempt at doingsth. (to do sth.) 试图做…

attribute…to…(=to believe sth. to be the result of…)把...归因于..., 认为...是...的结果