The principle and signal processing flow of air-to-ground ranging (AGR) in airborne radar are introduced, and the accuracy of pitch error is analyzed.

研究了机载雷达空地测距的原理和信号处理流程，并对俯仰误差精度进行了分析。

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Yet despite its high cost, creatures ranging from ground dwellers to tree climbers and even flyers do it.

尽管这些花费过多，从地上居的到树上爬的，甚至天上飞的动物们都会去做。

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It pumps hydrocarbons in more than two dozen countries, ranging from Russia to Qatar to Venezuela, and has on-the-ground experience in dozens more.

埃克森在20几个国家开采炭氢化合物，从俄罗斯、卡塔尔，到委内瑞拉，并且在当地已经有了十几年的开采经验。

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The company was the first to manufacture integrated circuits, which made millions for Sherman Fairchild and became the breeding ground for companies ranging from National Semiconductor to Sequoia Capital.

FORBES: The gentle giant

These multiple components of the AIA aside, it is clear that a watchful public, or at least many of those with their ears to the technological ground, regard the new law with emotions ranging from serious concern to extreme distaste.

FORBES: Are We Greeks or Romans? New Patent Law Means Challenges for U.S. Innovators

It pumps hydrocarbons in more than two dozen countries, ranging from Russia to Qatar to Venezuela, and has on-the-ground experience in dozens more.

ECONOMIST: Oil