The water is infiltrating the gravel bed.(水正渗透进碎石底层。)
The gravel pits have been landscaped and planted to make them attractive to wildfowl.(这些乱石坑已经被美化,种了树来吸引野生鸟类。)
The water was always laden with pebbles, gravel, and sand, known as glacial outwash, that was deposited as the flow slowed down.(水里总是遍布鹅卵石、砾石和沙子——它们被称为冰水沉积,是在水流减缓时沉积下来的。)
Frank walked along the tidy gravel walks, and looked at everything, but touched nothing that he saw.(弗兰克沿着整洁的砾石小路走着,打量着一切,但什么也没碰。)
Removing the mud, uncovering gravel beds where fish spawn, and finding suitable salmon types to rebuild the population is a daunting task.(清除淤泥,发现鱼类产卵的砾石层,找到合适的鲑鱼种类来重建种群是一项艰巨的任务。)
I crunched across the gravel to the front door.(我嘎吱嘎吱走过石子路来到前门。)
The commonest spaces are those among the particles—sand grains and tiny pebbles—of loose, unconsolidated sand and gravel.(最常见的空间是那些由松散的、未固结的砂和砾石组成的颗粒(沙粒和小卵石)之间的空间。)
The whole thing started in 1912 when Charles Dawson claimed to find some interesting bones in a gravel pit.(整个事件始于1912年,当时查尔斯·道森声称在一个砾石坑里发现了一些有趣的骨头。)