qiwang067 bfc8a88d82 add some derivation details

2020-10-26 16:39:22 +08:00

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img

fix some typos

2020-10-25 22:18:41 +08:00

chapter2_questions&keywords.md

Update chapter2_questions&keywords.md

2020-10-23 17:33:59 +08:00

chapter2.md

add some derivation details

2020-10-26 16:39:22 +08:00