Each of us can develop his or her own "energy saving programme" with a little self-observation, critical self-control and, above all, logical consistency.

我们每人都可以通过些许自我观察、批判性的自我控制，尤其是逻辑一致性，来制定自己的“节能计划”。

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Above the critical temperature and under high pressure the vapor may become as dens and as incompressible as the liquid at lower temperature.

在临界温度以上和高压下，蒸汽密度可能变得象在低温下液体那样稠密且不可压缩。

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It assumes a level above 2.0 is a warning state and level above 5.0 is critical.

它假定2.0以上的级别表示警告状态，而5.0以上的级别表示危险状态。

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However, a mid-morning ISM manufacturing index slid to just above the critical break-even reading and further than investors were braced for indicating a further stall in economic activity even if only in the less important sector.

FORBES: Treasuries Rally After Manufacturing Slump Triggers Growth Worry

In overnight news, Spanish 10-year bond yields poked above the critical 6% level Thursday, as the European Union sovereign debt crisis continues to fester.

FORBES: A.M. Kitco Metals Roundup: Gold Modestly Higher as Outside Markets Mildly Bullish

Apparently, all of the above were considered military-grade, mission-critical methods of communication 100 years ago.

FORBES: What is the Ultimate Ruggedized Mobile Device?