每章都提供了Portlet代码，这样，如果有疑难问题，可以参考该主题区域的解决方案。
Portlet code is provided for each chapter so that, if you do get stuck, you can refer to the solution for that topic area.
这一理论也为解决宇宙奇点疑难，宇宙的起源提供了一种可行的方案。
This theory also provide a possible schema for solving the singularity problem and the birth of the universe.
施工方案的推介及施工疑难的解决。
The promotion of construction program and the resolve of construction difficulties.
积极的思想者不懈地考虑和讨论解决方案；消极的思想者不停地讨论和考虑疑难问题。
Positive thinkers think and talk continually about solutions, and negative thinkers continually talk and think about problems.
积极的思想者不懈地考虑和讨论解决方案；消极的思想者不停地讨论和考虑疑难问题。
Positive thinkers think and talk continually about solutions, and negative thinkers continually talk and think about problems.
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