如何保存环境？
Each day has a topic, which includes food and fashion, looking at how humans harm the environment and how to save the planet.
每天都有一个主题，包括食物和时尚，着眼于人类是如何危害环境的以及如何拯救地球。
After working through this tutorial, you'll know how to change every aspect of the Emacs editing environment, and how to save your customizations so that they can be recalled later.
在完成本教程的学习之后，您将了解如何更改Emacs编辑环境的各个方面，以及如何保存您的自定义工作，以便稍后可以再次调用它们。
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