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heat map

noun
🔊/ˈhiːt mæp/
🔊/ˈhiːt mæp/
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  1. a diagram that uses different colours, or different shades of the same colour, to show different levels of activity
    • This heat map of crime data shows where the crime hotspots are.该犯罪数据热图显示了犯罪热点所在的位置。