Some researchers have hypothesized that it is the cumulative binding of adenosine to a large number of sites that causes the onset of sleep.

一些研究人员假设，腺苷与大量位点的累积结合导致了睡眠的开始。

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The cumulative effect of the sun's rays causes a multitude of damage to skin, but it's never too late to start protecting skin from the sun.

日积月累的日晒会对皮肤造成严重损害，但是什么时候开始让皮肤避免日晒都不晚。

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The paper analyzed the causes of the cumulative error produced in the procedure of Image Stitching and gave the solution for it.

分析了导致图象拼接累积误差的因素，提出了图象拼接累积误差的消除办法。

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Dr Lawrence Whalley of the University of Aberdeen, who led the research, said the explanation could be that smoking causes oxidative stress - cumulative damage caused by molecules called "free radicals" - to organs including the brain.

BBC: NEWS | Health | Smoking 'is bad for your brain'