WTF Solidity Japanese mainly 101 Lesson 12 to 14

[PolymetisOutis]

What type of PR is this (这是什么类型的PR)

• [ ] Typo(勘误)
• [ ] BUG(程序错误)
• [x] Improvement(提升)
• [x] Feature(新特性)

Which issue(s) this PR fixes(Optional) (这个PR 修复了什么问题 (可选择))

• resolve(修复) : #

What this PR does / why we need it (这个PR 做了什么/ 我们为什么需要这个PR)

[PolymetisOutis]

@AmazingAng CC: @thurendous Lesson 12~14 repo's push and personal recheck & modification has been already done.

[thurendous]

これはPR被ってたら、クローズで良いと思うが、どう？ @PolymetisOutis

[PolymetisOutis]

@thurendous CC* @AmazingAng ごもっとも。分けてPRしたんだけど、よく分かっていなかったから、クローズするよ！ You are right. I made separate PRs, but because I didn't fully understand, I will close this PR!!

[PolymetisOutis]

@AmazingAng CC: @thurendous For following thurendous' comment and point, I tend to close this PR.