matter

Compared meaning: something talked about or thought over (noun).

比较义项：话题、事情、议题（名词，谈论或思考的对象）。

• topic

  Neutral word for any subject chosen to discuss, write about, or think over; carries no hint of trouble. Common with 'discuss a topic' or 'topic of conversation'.

  中性词，指选定来讨论、书写或思考的对象，不带任何“有问题”的意味，常与 discuss a topic、topic of conversation 搭配。

  Let's change the topic before things get awkward at dinner.

  在晚餐变得尴尬之前，我们换个话题吧。

• issue

  Adds the sense of a problem or point of disagreement that needs addressing or debating; typically follows verbs like 'raise', 'address', or 'deal with'.

  带有“问题、分歧”的含义，指需要处理或辩论的事项，常与 raise、address、deal with 等动词搭配。

  The team finally raised the issue that no one wanted to discuss.

  团队终于提出了那个没人愿意谈的问题。

• matter 本词

  The most general and slightly formal word for a subject, affair, or situation; common in fixed phrases such as 'as a matter of fact' or 'a legal matter'.

  最笼统、略正式的说法，泛指事情、事务或状况，常见于 as a matter of fact、a legal matter 等固定说法中。

  This case is a serious matter for the whole community.

  这件事对整个社区来说是一件严肃的事情。

All three mean the thing talked about or thought over. Topic is neutral, with no hint of trouble. Issue adds a problem or disagreement needing attention, often after 'raise' or 'address.' Matter is the most general and slightly formal word.

这三个词都可以指“被谈论或思考的对象”，但语气和正式程度不同：topic 中性，指选定谈论或写作的话题；issue 带有“问题、争议”的意味，往往需要处理或解决；matter 最笼统、略正式，常出现在固定说法中，如 as a matter of fact、a legal matter。这里不比较 issue 的“发行、期号”义，也不比较 matter 的“物质”义。