One obvious impact is the radical alteration of the land surface.

一种显而易见的影响是大地表面剧烈的改变。

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The characteristic spectrum produced by the interaction between the electromagnetic wave and surface rock is the theory basis of the mineralizing alteration information extraction by remote sensing.

电磁波与地表岩石、地质体发生作用，产生其特征光谱为遥感提取矿化蚀变信息提供了物理基础。

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Some developed methods of analysis are used to discuss the action of low temperature plasma on wool and the alteration of the surface structure of wool.

通过先进的分析、测试手段，探讨了低温等离子体对羊毛的作用及由此引起羊毛表面结构的变化。

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Drilling a few centimetres inside a rock provides a fresh sample that is free from the alteration that can occur at the surface as a result of weathering or radiation damage.

BBC: Curiosity Mars rover hammers into rock