词典释义：
释义
n.
the impression left by a foot or shoe on the ground or a surface
脚印，足迹。
the impact on the environment of human activity in terms of pollution, damage to ecosystems, and the depletion of natural resources
人类活动对环境的影响（如污染、生态系统的破坏和自然资源枯竭）
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these countries are so populous that they can have a very big footprint .这些国家人口过多，可能对环境造成巨大影响。
【计算机】（程序所需的）内存占用量；磁盘空间。
the area covered by something, in particular
覆盖地区，尤指：
the area beneath an aircraft or a land vehicle which is affected by its noise or weight
（飞机或车辆的）噪音（或重量）覆盖区。
the area in which a broadcast signal from a particular source can be received
广播信号覆盖区。
the space taken up on a surface by a piece of computer hardware
（计算机硬件的）台面面积。
