It is our perfect guide in all matters of life.

它是我们生命的导向和衡量一切事物的准绳。

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The two-MRC standard was never considered a perfect guide to force sizing and modernization.

CENTERFORSECURITYPOLICY: Center for Security Policy | The Measure of a Superpower: A Two Major Regional Contingency Military for the 21st Century

As human behavior and weather cycles have not changed much for hundreds of years, the odds of a continuation of past trends are a good, but not perfect, guide to the future.

FORBES: Briefing Book: A. Michael Lipper

And this makes him a perfect choice to guide American diplomacy in the years ahead.

WHITEHOUSE: President Obama Nominates John Kerry for Secretary of State | The White House