Since there is a great difference of dielectric constant value between water and building materials, a very small amount of water molecule in the structure can be easily detected.
由于水分子及结构材料的介电值之间有极大差异，因此在结构材料中即使有少量水分子都能被探测出来。
Since there is a great difference of dielectric constant value between water and building materials, a very small amount of water molecule in the structure can be easily detected.
由于水分子及结构材料的介电值之间有极大差异，因此在结构材料中即使有少量水分子都能被探测出来。
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