词源学只能问，为什么缝纫时使用的一个小杯状装置被称为顶针，但它却是在中指上使用的。
Etymology can only ask why a small cuplike guard used in sewing is called a thimble, though it is put on the third finger.
原生孔隙度以砂岩粒问孔隙度和某些石灰石的晶体粒间和鲕状孔隙度为代表。
Original porosity is typified by the intergranular porosity of sandstones and the intercrystalline and oolitic porosity of some limestones.
原生孔隙度以砂岩粒问孔隙度和某些石灰石的晶体粒间和鲕状孔隙度为代表。
Original porosity is typified by the intergranular porosity of sandstones and the intercrystalline and oolitic porosity of some limestones.
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