Hundreds of Been there readers sent in images this month, which featured every colour in the spectrum.
成百上千的“在那里”的读者十月发来了图片,展示了每一种光谱中的颜色。
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By analysing data from a sensor that detects light in both the visible and the near-infra-red spectrum, a computer is able to determine the colour, type, shape and position of each item.