The hue is caused by the silt that is finely groundaway from the valley walls by the glacier and deposited in the lake.
这种色调是由淤泥造成的，淤泥被冰川分成很多远离谷壁的细碎的小块，沉积在湖中。
2
The steps have been groundaway by the passing feet of many visitors over the centuries.
这些台阶被几百年来众多参观者的过往脚步磨坏了。
《新英汉大辞典》
3
For about a month, for ten hours every night on a hundred computers at Xerox PARC, in Palo Alto, Eurisko groundaway at the problem, until it came out with an answer.