Artificial intelligent assistant

footprint

footprint
n [C usu pl 通常作复数]
impression of a human or an animal foot on a surface; mark left by a foot 脚印; 足迹
    leave footprints in the snow 在雪地上留下足迹
    muddy footprints on the kitchen floor 厨房地板上的泥脚印.

牛津英汉双解词典

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