To make sure the iPhone didn't generate too much radiation, Apple built models of human heads — complete with goo to simulate brain density — and measured the effects.

为了确保iPhone产生的射频辐射在规定的范围内，工程师们专门建立了几个仿真人类头部的模型，其中包括仿真大脑的粘状物，来测定辐射对于大脑的影响。

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In addition to other effects, a nuclear weapon detonated in or above the earth's atmosphere can create an electromagnetic pulse (EMP), a high-density electrical field.

除了其他影响，在地球大气层中或之上引爆的核武器会产生一种电磁脉冲(EMP)，这是一种高强度的电场。

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Density had more significant effects on wheat yield than soil fertility.

密度对小麦产量的影响比土壤肥力更为显著。

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These receptors are usually found in particularly high density in the cells of the hippocampus that are most vulnerable to the effects of Alzheimer's disease.

BBC: NEWS | Health | Hope for early Alzheimer's test

The result is a much greater density of the gates, lower power consumption, faster switching and fewer quantum side-effects.

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In 19 patients with low levels of HDL (high-density lipoprotein), the Pfizer combo raised HDL counts by 61%, with few side effects.

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