One can hardly believe that this paper mill was started from scratch only a few years ago.
很难相信这个造纸厂仅仅是在几年前白手起家办起来的。
The ones in this book, every one of them, are developed totally from scratch.
这本书中的每一个人都是完全从零开始成长起来的。
The intent of this article is not to explain these default life cycles, but rather to describe how to build a new one from scratch.
本文的目的并不是对这些缺省生命周期进行解释，而是要说明如何从头构建新的生命周期。
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