The theoretical background of equivalence principle is briefly given, and the experimental tests of the equivalence principle is discussed in detail, via free-fall method and torsion balance.

本文简要阐述等效原理的研究背景，通过对自由落体法和扭秤法检验等效原理的详细介绍来具体讨论等效原理的实验检验。

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If we want to receive the recognition we deserve, we must fall into that top 8 percent of the workforce, regardless of the method employers implement to measure, rank, and rate their employees.

FORBES: The Average Raise Next Year Will Be 2.9 Percent

For compatibility, view controllers that still implement the shouldAutorotateToInterfaceOrientation: method do not get the new autorotation behaviors. (In other words, they do not fall back to using the app, app delegate, or Info.plist file to determine the supported orientations.) Instead, the shouldAutorotateToInterfaceOrientation: method is used to synthesize the information that would be returned by thesupportedInterfaceOrientations method.

ENGADGET: Apple seeds iOS 6 beta 4 to developers: here's the changelog