Water percolates through sand.是什么意思？

Water percolates through sand.

水由沙中滤过.

water

n. 水，雨水，海水，海域；v. 给…浇水，供以水，加水稀释，流泪；

例句
...a licence to abstract water from the River Axe...
从阿克斯河中抽水的许可证

percolates

v. 滤( percolate的第三人称单数 )，渗透，（思想等）渗透，渗入；

例句
At a low flow rate, fluid merely percolates through the void spaces between stationary particles.
当流速低的时候, 流体只是穿过静止的颗粒之间的空隙.

through

prep. 通过，穿过，经由，透过，凭借；adv. 从头到尾，彻底，自始至终；adj. （电话）接通，通话完毕，有洞的，直达的；

例句
The proposal was instantly voted through with two to one in favour, accompanied by enthusiastic applause...
在热烈的掌声中，提案以2比1的优势很快通过了表决。

sand

n. 沙，沙滩，沙色；vt. 撒沙于，用砂纸磨光；

例句
... the mile of white sand beach bordered by palm trees and tropical flowers
四周种有棕榈树和热带花卉的长达1英里的白色沙滩