This book is divided into 2 parts: part I of the book is a systematic course in knots and physics starting from the ground up.
这本书被分成2个部分：书的是重新开始的一门有系统的结和物理学课。
It's of course expected you'll be exiting and then starting up new games, but it isn't intended to be a grind to level.
我们当然预计到了你会退出并重新建一个新游戏，不过这不是为了让你磨着升级。
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