[!note]
This PR was merged first to give the reader a preliminary version.
The first five chapters had been updated in #1335.
The optimized version will be updated in #1336, #1337, #1338, #1339.
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[x] This PR represents the translation of a single, complete document, or contains only bug fixes.
[x] The translation accurately conveys the original meaning and intent of the Chinese version. If deviations exist, I have provided explanatory comments to clarify the reasons.
If this pull request (PR) pertains to Chinese-to-English translation, please confirm that you have read the contribution guidelines and complete the checklist below: