1.discussion的基本意思是“讨论”“商讨”。表示讨论的“行为”,既可作可数名词,也可作不可数名词。
2.discussion后可接介词about,of,on引出讨论的内容。
3.under discussion在句中作表语或位于名词之后作定语,而不可用作状语。

under discussion
正在讨论中 being talked about
The plans have been under discussion for a year now, but no decision has been reached.那些计划都讨论一年了,还是没有结果。
Your suggestion is now under discussion.你的建议现在正在讨论中。
The control of guns is under discussion.枪支管制问题正在讨论中。
That is a plan under discussion.那是一个正在讨论中的计划。
The plan under discussion is very important.正在审议中的计划非常重要。

Discussion was going on among the students about the ideal.在学生中间进行了一场有关理想问题的讨论。
The discussion over the plan lasted 3 hours.对这项计划的讨论进行了3个小时。
We'll stop here today, and go on with the discussion.今天就讨论到这里,明天接着讨论。
Will you join us in the discussion?你和我们一起讨论好吗?
Only after much discussion can we reach a conclusion about it.只有在详细讨论之后,我们才能就此事作出结论。
The incident caused much discussion.这个事件引起了很大争论。
His arrival caused much discussion in the village.他的到来引起全村议论纷纷。
The question gave rise to much discussion.这个问题引起了不少的议论。
Following the lecture, a discussion was held.讲课后开了讨论会。
His observations gave rise to an animated and lively discussion.他的言论引起了一场气氛热烈而活跃的讨论。
They had a heated discussion at the meeting.他们在会上进行了热烈的讨论。
We had an animated discussion over current events last evening.昨天晚上我们热烈地讨论时事。
We ought to have another discussion about this year's budget.我们应当对今年的预算再进行一次讨论。
They held a stormy discussion about this problem.他们围绕这个问题进行了一场激烈争论。
They had a heated discussion about the mark's highs and lows.他们就分数的高低进行了热烈讨论。
They had a group discussion on modern art.他们对现代艺术进行了一次小组讨论。
We're having a discussion on the student's paper.我们正在讨论这位学生的论文。
Let's have a discussion on this matter.让我们就这件事讨论一下。

discussion about, discussion on
对某事进行一般的讨论用discussion about; 对某事进行正式专门的讨论用discussion on。
discussion, chat, conversation, dialogue
参见conversation条。

讨论正在进行。
［误］  A discussion is being had by us.
［正］  A discussion is being held (by us).
［析］  to have a discussion不用于被动结构,被动句中须用hold的过去分词held。

［同义词］   argue, debate, dispute