affair
单词辨析：
通常指关乎利益、命运等的紧要事务，必须予以考虑或解决。
This is a serious matter that you need to concentrate on.
这件事很严重，你需要集中精力解决。
This is a matter for the manager to decide.
这是该由经理决定的事。
指令人印象深刻的重大事件或具有某种特点的不寻常之事。
Who first reported the Watergate affair?
谁最先报道了水门事件？
The wedding was a very grand affair.
婚礼场面非常隆重。
affairs 表示公共或政治事务、活动，也可指私事。
She is interested in public affairs.
她对公共事务感兴趣。
Don't keep asking about my financial affairs.
不要总是打听我的财务问题。
指需要完成或讨论的重要事务，也指归某人管的事或某人持有某种看法的事情。
Let's get down to the unfinished business.
我们来处理尚未了结的事务吧。
My family life is my personal business.
我的家庭生活是我的私事。
He regarded homework as serious business.
他把作业当作重要的事。
指关系到某人切身利益、引起其关注或担忧的重要事情。
What is a mother's main concern?
当妈妈的最关心什么？
How to control inflation has become a major concern for consumers.
如何控制通货膨胀已成为消费者关注的重要问题。
普通用词，词义最为广泛，可指任何事实、事件、情况、行为等。
That strange thing worried him a lot.
那件奇怪的事情让他十分不安。
The first thing to do is to improve their working conditions.
首要的事是改善他们的工作环境。
相关例句：
The unexpectedness of my father's death meant that his affairs were not entirely in order.
家父的猝然离世留下了尚未完全安排妥当的身后事。
We should not pass over this disgraceful affair in silence.
我们不应对这件可耻的事保持缄默。
He has leveled with the American people about his role in the affair.
他向美国人民坦白了他在这个事件中所扮演的角色。
If you will undertake the affair, I shall be very grateful.
要是你愿意承办这件事，我将不胜感激。
When she had an affair with her friend's husband, she wittingly set off a chain of crises.
她和朋友的丈夫私通，故意引发了一连串危机。
Breakfast will be a cheerless affair for the Prime Minister this morning.
今天的早餐会让首相感觉全然无味。