Another nice context to think about this is in prolog. It is often the case that we can write a n-ary relation and then write a (n+1)-ary version that contains a tracing parameter. This tracing parameter is a proof object / witness.
很多人认为山姆在2025年的争议，与企业发展过快有关。不过，也有零售业分析人士认为，在中国消费者中，山姆同款、山姆平替已经成为一个特有的现象，而且还催生了庞大的代购军团。代购军团本质上就是下沉市场的消费升级需求的外溢。从这个逻辑看，山姆加快速度占领这些翘首以待的下沉市场，并无不妥。。WPS办公软件对此有专业解读
，这一点在谷歌中也有详细论述
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in [args] starts and optionally ends a block containing，推荐阅读超级工厂获取更多信息