Two electrodes that measure changes in the body's surface moisture are attached to the palms of your hands.

测量体表湿度变化的两个电极被连接到你的双掌上。

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It's a bit like if you're pushing a boat through a river and measuring something about the surface - you don't want to measure the ripples from the boat.

这就有点儿像你将一艘船从河的这边推到另一边，并测量河面上的某些东西，但你不希望连同船儿泛起的涟漪也一并测量出来。

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The US space agency on Friday launched a satellite to observe levels of salt on the surface of the world's oceans and measure how changes in salinity may be linked to future climate.

美国航空管理局于周五发射了一个卫星，该卫星用以探测全球海洋表面的盐度等级，并以此来来测评盐度与未来天气变化的关系。

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The exploration vehicle will be able to measure methane even at very low levels in many places on the surface.

VOA: special.2009.12.30

It turns out the electrical potential or electricity that you can measure on the surface of the body reflects things that are happening deeper inside like the beating of your heart.

人们已经证明在体表测量得到的电势能,或者电信号,能够表征,像心跳这样,身体较深处的变化

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Rather than by forming an image or a picture you put electrodes on the surface of the body and measure the electrical potential as a function of position on the body.

它并不对人进行直接的造影,而是将电极放到身体表面,通过测量该位置电势能,表征该部位的生理状态

耶鲁公开课 - 生物医学工程探索课程节选

Ancient engineers used various methods, including weighted strings, to measure surface angles.

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The gradients seem less marked over the oceans where a lot of gravity field information has already been determined by spacecraft that measure sea-surface topography.

BBC: Europe's Goce satellite probes Earth's gravity

But by the Berkeley team's analysis, the global temperature correlates more closely with the state of the Atlantic Multidecadal Oscillation (AMO) index - a measure of sea surface temperature in the north Atlantic.

BBC: Global warming 'confirmed' by independent study