They dredge the bay for gravel.

他们在挖掘海湾沙砾。

The car drew up with a crunch of gravel.

那辆汽车在沙砾路上嘎吱一声停了下来。

She heard the crunch of tyres on the gravel driveway.

她听到车胎碾在碎石铺成的私家车道上发出的嘎吱声。

I signed in and crunched across the gravel to my room.

我签到后便嘎吱嘎吱地穿过砾石路走到我的房间。

It was raining quietly and steadily and there were little pools of water on the gravel drive.

雨正静静地下着，砂砾车道上积了一滩滩的水。

We walk on and on in the dark over the loose gravel.

我们在黑暗中，在松软的砂砾上不停地走啊走。

These materials will be mixed with lunar soil and gravel to make concrete.

这些材料将与月球土壤和碎石混合制成混凝土。

An unremarkable shrub on the gravel plain moved and resolved into an ostrich.

砾石平原上的一株不起眼的灌木移动了一下，变成了一只鸵鸟。

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。

Newly designed giant gravel batteries could be the solution to the on-off nature of wind turbines and solar panels.

新设计的巨型砾石电池可以解决风力涡轮机和太阳能电池板的开关问题。

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 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。

Icebergs are ordinarily blue to white, although they sometimes appear dark or opaque because they carry gravel and bits of rock.

冰山一般是蓝色到白色，尽管有时因为携带了砾石和小岩石而变成黑色或者不透明。

The salt and gypsum, the faunal changes, and the unusual gravel provided abundant evidence that the Mediterranean was once a desert.

盐和石膏、动物群落的变化和不寻常的沙砾充分证明地中海曾经是一片沙漠。

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。

Sediment as you know, is material like sand, gravel, fossil fragments that is transported by natural processes like wind, water flow or the movement of glaciers.

如你所知，沉积物是通过风、水流或冰川运动等自然过程输送的物质，如沙子、砾石、化石碎片等。

Where 50-kilogram king salmon once fought their way up waterfalls to lay their eggs in gravel beds, there now are only concrete walls holding back still water and deep beds of muddy deposits.

50公斤重的大马哈鱼王曾经奋力爬上瀑布，把卵产在砾石床上，现在只有混凝土墙挡住静止的水和深深的泥床。

The water burbled over gravel.

水汩汩流过卵石。

I crunched across the gravel.

我从石子上嘎吱嘎吱地踩过。

I crunched across the gravel to the front door.

我嘎吱嘎吱走过石子路来到前门。

We took a gravel road that meandered through farmland.

我们走上了一条蜿蜒穿越农田的石子路。

This area of former farmland was worked as a gravel pit until 1964.

这片昔日的农田在1964年前是被用作采砾坑的。

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。

Above 4,000 meters is the highland desert: gravel, stones, and rocks.

海拔4000米以上是高山寒漠：砾石、石头和岩石。

This country has to work with many other nations and listen to them, not apologize, not gravel.

这个国家必须与许多其他国家合作，听取他们的建议，而不是道歉，不必困惑。

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。

Most shallow aquifers in sand and gravel deposits produce lower yields, but they can be rapidly recharged.

"大多数沙石中较浅的蓄水层贮水量少，但可以迅速再生。

More gravel is needed to fill the hollow in the drive.

需要更多的砾石来填平车道上的坑洼。

Plastic bottle and sand or gravel.

塑料瓶，沙子和小石子。