写例证段落时，例子主要有三大来源：personal experience（个人经历）、observed examples（观察所得）、knowledge from reading（阅读获得的知识）
1. Personal experience 个人经历
英文：Examples come from your own life, what you have done or experienced.
中文：来源于作者自身生活、亲身做过或者经历过的事。
优点：真实、生动，写起来容易上手。
注意：个人经历尽量具备典型性，不要用过于特殊、极端的私人事例。
例句：I learned a lot from my part‑time job. It taught me how to communicate with different people.
我从兼职中学到很多，它教会我如何和不同的人沟通。
2. Observed examples 观察所得
英文：Examples from what you have seen around you, other people’s stories and real‑life phenomena.
中文：来自日常生活观察，身边其他人的事例、社会现实现象，不是自己亲身经历。
例句：Many old people take up new hobbies after retirement. My neighbor learns painting in his seventies.
很多老人退休后培养新爱好，我的邻居七十多岁学习绘画。
3. Knowledge from reading 阅读所得
英文：Examples from books, newspapers, magazines and other reading materials, including facts and public cases.
中文：来自书本、报刊等阅读材料，包括客观事实、公共事例。
例句：Some famous scientists kept learning new things even in their old age.
一些著名科学家即使到老年依然坚持学习新知识。