The driving force of primary migration is mainly abnormal high pressure and that of secondary migration is buoyance and fluid potential difference.

初次运移的动力主要是异常高压，二次运移的动力主要是浮力和流体势差。

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Uncooled bi-material infrared detectors have the potential of approaching the theoretical limit of noise equivalent difference in temperature because of its high sensitivity and low noise.

非致冷双材料室温红外探测器具有高响应率和低噪声的特点，噪声等效温差接近理论极限。

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Two types of tidal energy can be extracted: Kinetic energy of currents due the tides and potential energy from the difference in height (or head) between high and low tides.

两种类型的潮汐能可提取：电流，由于潮汐的动能和势能之间的高度，从在涨潮和退潮(或主管)的差异。

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Take a well-known statistic: As recently as the 1970s, there was little difference in the lifetime earning potential between a high school grad and a four-year-college degree holder.

FORBES: Is College Worth It?