Einstein suggested that the wave aspect of light resulted from the averagebehaviour of a large number of photons.
爱因斯坦提出:光的波动性是从大量光子的平均行为得来的。
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Other studies show that simply providing the facility for people to compare their energy use with the local average is enough to cause them to modify their behaviour.
Three years after programme initiation, the number of households using piped water and private pit latrines had increased by 10% on average, but no changes in hygiene-related behaviour had occurred.