1、discussion 是可数名词2、作可数名词讲，主意通常是关于某些重要事情的交流。 Preliminary discussions between the two leaders are now underway. Discussions about the peace plan took place in Washington last week.3、作可数名词讲，有时亦可表示关于一些重要或严肃话题的书面阐述。 What follows is a discussion of the merits of each method.4、也可作不可数名词讲，主意通常是对某重要事件进行讨论的过程： There should be wider discussion of these issues. Proposals for changing the existing system are currently under discussion.