...致密岩石；声学参数；饱水；各向异性 中图分类号：TU 459+.3 文献标识码：A 文章编号：1000–6915(2005)05–0823–06 [gap=1609]Key words：rock mechanics；low-porosity rock；acoustic parameter；water saturation；anisotropy ..
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C. If water flows through a rock easily, it has permeability but low porosity.
如果水很容易的留过岩石的孔，就是有渗透性，但是多孔性很低。这个文章也没有说说。
Because soft rocks have low strength and high porosity and contain large amount of expansive clay minerals, the freezing-thawing process of soft rock is complicated.
由于软岩为强度低、孔隙度大、胶结程度差、含有大量膨胀性粘土矿物的松散、软弱岩层。
Tertiary reservoir rock abounds and is mainly composed of medium-low porosity and permeability one.
下第三系储层发育，但以中低孔渗储层为主；
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