你是问discussion吗？discussion是有复数形式的，是可数名词。

1.作可数名词讲，主意通常是关于某些重要事情的交流。

①Preliminary discussions between the two leaders are now underway.

②Discussions about the peace plan took place in Washington last week.

2.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。

①What follows is a discussion of the merits of each method.

3.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：

①There should be wider discussion of these issues.

②Proposals for changing the existing system are currently under discussion.

还是说你问的是dissension？不过dissension也是有复数形式的。