discuss: implies sifting of possibilities by presenting considerations of pros and cons: ~ the need for widening the expressway.


argue: implies an often heated offering of reasons and evidences in support of convictions already held: ~ the project would be too costly.


debate: suggests a formal or public argument between opposing parties: ~ the merit of the proposed constitution amendment.


dispute: implies a contentious and heated argument: scientists ~ the reason for the extinction of the dinosaurs.


discuss讨论: 指讨论利弊，过滤各种可能, argue论证争论: 常指激烈提出理由证据，以支持已有观点，debate辩论: 表示对立双方正式公开的论证争论，dispute争端: 指激烈的争吵争论


记忆方法: 1）首字母联想，DADD俺的弟弟<==爱讨论


         2）程度不同，第二个词往后都是argument争论，激烈程度递增。

         3）讨论的意思是论述某事以使人相信mean to discourse about something in order to reach conclusions or to convince others of the validity of one's position.