前書き
5.155. The birth of a dragon.     AR AR
6.645. About human learning.     AR AR
10.2511. Useful skills.     AR AR
10.4064. 1% effort is 15 minutes a day.     AR AR
10.15532. Strength training.     AR AR
10.21764. Fruitful time.     AR AR
本の始まり
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