因此，举个例子，沙岩可以和构成它的疏松的沙粒一样具有多孔渗水的特点。
The result is that sandstone, for example, can be as porous as the loose sand from which it was formed.
较紧密的木层比较疏松的木层颜色更深。
The denser layers are generally darker than the less dense layers.
木糖醇似乎有治愈骨质疏松的潜力。
Xylitol also appears to have potential as a treatment for osteoporosis.
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