如果岩石是渗水的——岩石中有许多小孔，比如沙石——水将渗透过这些小孔，直到由不渗透水的岩石构成的那个层面。
If the rock is porous — has many small holes in it, like sandstone — water will sink through these holes until it reaches a layer of rock that is not porous.
对。漓江的水犹如水晶一样，晶莹清澈，不管水有多深，都清澈见底，能清楚地看到江底的沙石与杂草。
You're right. The Li River is crystal clear, and no matter how deep the water is you can see the bottom-the pebbles, sand and weeds clearly.
我们抖擞精神，一气走过壶天阁，登上黄岘岭，发现沙石全是赤黄颜色，明白中溪的水为什么黄了。
Putting on a spurt we soon reached the Heavenly Tea-pot Tower and Mount of the Yellow Escarpment, whose orange sandstone accounts for the amber colour of the water below.
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