学语言就会接触到 Register 也就是语域的概念。剑桥词典对 Register 的解释是：the style of language, grammar, and words used for particular situations；我的定义是：见人说人话，见鬼说鬼话。
用例子说明更容易理解。
（一）最近发现了一个听写网站和一个听写小程序，都是每天一句，也都很好用。网站听写分两个版本，某天的练习 Hard 版是酱紫的：
My canine companion, whom I have christened Sam, exhibits an almost fanatical enjoyment when engaged in interactive activities involving his spherical object of play.
这词儿拽的，好像是多么专业的话题，翻译成人话就是：I have a lovely dog named Sam. He likes to play with his toy ball.
这两句意思一样的话就是 Register 的好例子，第一个版本用的都是大词，甚至是专业术语；第二个是日常小词。
（二）Luke Thompson 有一集播客，Describing a Car Accident in 15+ Different Styles of Language，能帮助更好地我们了解 Register， 非常有趣。例如：
警方报告：The driver of the blue sedan, identified as John Doe, was found to have suffered minor injuries and was transported to the local hospital for treatment. 冷冰冰只陈述事实，用被动语态，identified, transported 是正式用词。
两个朋友八卦：Yeah, the driver of the sedan got a few minor injuries and had to go to the hospital. 用小词 got, had to go to 和主动语态，随意、松弛。
平时学词汇，关注一下某词是否是正式表达或非正式表达，是书面用语还是口语，想想能在什么场景下用，能让我们用词更准确。阅读的时候，看到语域差别较大的词，想想作者为什么这么用，对文本的理解会更深入。
Happy reading!
PS: 播客链接不能内嵌，附上 https://teacherluke.co.uk/2023/08/02/837-describing-a-car-accident-in-15-styles-of-english-%F0%9F%9A%97%F0%9F%93%9A/