The necessary space is there, however, in many forms.

地下是指渗入到地下并将所有岩石孔隙填满的。到现为止，大气是最丰富的地下资源，是地下循环中的一个环节。普通的大气会从地表、降湖泊河流入到地下。冒出地表之前，这些地下有时会长时间留地下。最初让人觉得难置信的是，我们脚下“坚实的”土地中竟然有足够的空间能储存这么些。

Gradual increases in loading will only cause the water within the soil to flow  out, equalizing the pore water pressure.

负荷的逐渐增加只会导致土壤中的流出，平衡孔隙压力。

A membrane with pores bigger than water particles, but smaller than salt particles, only lets fresh water pass through, transforming what was once undrinkable into a life saver.

一种孔隙大于颗粒但小于盐颗粒的膜，只允许淡通过，将曾经不可饮用的东西变成救生员。

And as it rains, the water seeps into the soil, the pores become filled with water, and as it keeps raining, the water pressure in the pores increases, which decreases the friction between the grains.

当下雨时， 渗入土壤中，孔隙中充满了，随着下雨的持续， 孔隙中的压增加，从而减少了颗粒之间的摩擦力。