事件按照文档的树状结构进行假想的旅行，这个过程称为传播。
An event takes an imaginary journey, known as propagation, through the tree structure of the document.
Sam Weiner正在写假想的未来历史，内容是一些折扣和交易事件。
Sam Weiner is writing a mock future history, detailing offers and events to come.
从外部来看，主动性显得令人钦佩：在过去的工作中，大多数人表示他们愿意站起来面对假想的恶霸，受害者回顾事件时常常希望他们这样做。
Proactivity appears admirable from the outside: in past work, most people said they would prefer to stand up to hypothetical bullies, and victims looking back on events often wish they had done so.
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