一个简单的性能指标是挂钟时间(wall clock time)，或测量页面请求与完成呈现之间的实际延迟。

A simple performance metric is wall clock time, or measuring the real-world delay between a request for a page and a finished rendering.

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据经济学家介绍，体重指数(测量体重与身高比例的指标)上升10%，男性的实际收入就会下降3.3%，女性则会下降1.8%。

Just a 10 percent increase in body mass index, a measure of weight relative to height, can cut a man's real earnings by 3.3 percent and a woman's by 1.8 percent, according to economists.

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本系统能够完成发动机的转速、转矩的高精度控制与测试，以及发动机温度、压力、油耗等指标参数的测量。

This system can complete the engine rotational speed and torque high accuracy control and the test, also engine temperature, pressure, oil consumption parameters survey.

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