“如果你不能用简单的语言讲清楚一个概念，那你就还没有真正理解它。”
费曼学习法是由诺贝尔物理学奖得主理查德·费曼（Richard Feynman）提出的一种高效学习方法，核心理念是：“如果你不能用简单的语言讲清楚一个概念，那你就还没有真正理解它。”
它只有四个步骤：
1. 选一个你想学的概念
比如：“咖啡”、“引力”、“复利”。
2. 用自己的话讲出来，像讲给小学生听一样
不要用专业术语，用最简单的语言去解释，就像讲故事一样。
3. 找出你讲不通的地方，再回去查漏补缺
如果有讲不清、卡壳的地方，说明你还没完全理解，就回去学习补上这个知识点。
4. 简化、类比、重组你的讲解
尝试用比喻、例子，让整个讲解更通俗易懂。越简单、越顺畅，说明你掌握得越牢。
费曼学习法核心逻辑是：“输出式学习”，让你从“会看、会背”变成真正的“会讲、会用”。
学任何东西，只要能讲得清清楚楚，基本就掌握了！
输出式学习就是讨论、实践、教授他人，属于主动学习。
输入式学习就是听讲、阅读、试听、演示这些方法，属于被动学习。
只有输出式的学习才能形成自己的知识体系，那么就很难忘记这个知识点了。
“If you can’t explain a concept in simple terms, then you don’t truly understand it.”
The Feynman Technique is an effective learning method proposed by Nobel Prize-winning physicist Richard Feynman. Its core principle is:“If you can’t explain a concept in simple terms, then you don’t truly understand it.”
It only takes four steps:
1. Choose a concept you want to learn
For example: “coffee,” “gravity,” or “compound interest.”
2. Explain it in your own words, as if you were teaching a child
Avoid technical terms. Use the simplest language possible—like telling a story.
3. Identify areas where you get stuck, and go back to fill in the gaps
If you can’t explain something clearly or get stuck, it means you haven’t fully grasped it. Go back, learn it again, and fix those weak spots.
4. Simplify, use analogies, and reorganize your explanation
Try using metaphors or examples to make your explanation more understandable. The simpler and smoother it sounds, the better you’ve learned it.
The core idea of the Feynman Technique is “output-based learning”—shifting from simply reading and memorizing to truly explaining and applying.
Once you can clearly explain something, you’ve basically mastered it.
Output-based learning includes discussing, practicing, and teaching others. It’s active learning.
Input-based learning, like listening to lectures, reading, or watching videos, is passive learning.
Only through output-based learning can you build your own knowledge system—one that sticks with you and is hard to forget.
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