今天看到一篇新闻，题目为“LeBron James Gets Ejected After Altercation With Isaiah Stewart”，其中出现了”altercation“一词，我脑子里便联想出和它极像的另一个单词”alternation“。今天我们就介绍一下这对”双胞胎“。
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Altercation
Collins：An altercation is a noisy argument or disagreement.
Webster：a noisy, heated, angry dispute
这个词的意思是“（激烈的）争辩，吵嘴“，使用时请注意两点：1）正是一个非常正式的用语，请在正式场合使用，2）常用形式是altercation with/between
例句：
1. I had a slight altercation with some people who objected to our filming. 我和一些反对我们拍电影的人之间发生了一点点小争执。
2. The France defender begins a three-match suspension on Saturday because of an altercation with Pablo Zabaleta. 这位法国后卫因为巴布罗·萨巴莱塔发生冲突，他在周六开始为期三场的停赛。
Alternation
alternation 不常用的单词
Collins：successive change from one condition or action to another and back again repeatedly
Webster：the act or process of alternating or causing to alternate
这个词的意思是“轮替、变换“，请注意这个词暗含的那种”两者（或数者）轮替，你来我往“的倾向。
例句：
1. Power alternation also polarizes debate.
2. It carries on, most of it, as though we are a relapse away from 1955 and the certainties of majority rule and party alternation.
另外，altercation和alternation都有各自的动词形式altercate和alternate，如：
1. Let's amount out if you're the appropriate being for this job afore we altercate how little you wish to be in the appointment.
2. The three acts will alternate as headliners throughout the tour.
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