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1·The wind booms down the curved length of the trailer and under its roaring passage he can hear the scratching of fine gravel and sand.

风沿着拖车的轮廓呼啸着打转，他都能听到沙砾在风中发出刮擦声。

2·Minimize the amount of water your toilet uses with each flush by putting a plastic bottle (a large pop bottle will do fine) filled with sand or gravel in the toilet tank.

想减少冲马桶时的用水量，你可以把一个装满沙子或小石子的塑料瓶（汽水瓶也可以），放在水箱里。

3·A coarse sieve used for sifting out fine particles, as of sand, gravel, or coal.

筛子：一种粗筛，用于筛选优良的东西，比如沙子、碎石或者煤。

4·If gravel is used, it usually contains sufficient clay and fine material to help stabilize the surfacing.

如果用了砾石，通常它包含了足够的粘土和细密的材料以帮助路面的稳定。

5·In drainage of agricultural lands, a filter or gravel envelope is used to prevent the entrance of fine sand and silt into the drains.

在农田排水中常常采用砾石或过滤层来防止粉细砂和泥沙进入排水沟。

6·The model stratums mainly included miscellaneous filling soil surface, interaction stratum of silty clay, silt and fine sand and pebble round gravel at the bottom of station tunnel.

模型介质材料分别模拟地表杂填土层，粉质黏土、粉土、粉细砂互层和车站隧道底部的卵石圆砾层；

7·Replacing fine grained subsoil with sandy gravel for preventing structures from frost damage is widely and effectively used in cold regions at home and abroad.

用砂砾料换填细粒土地基，防治寒冷地区建筑物冻害是行之有效的方法，在国内外广泛使用。

8·The frost heave ratio, as an index of classification of frost susceptibility for sandy gravel, mainly depends on not only the. content of fine grained soil but also its freezing condition.

饱水砂砾料冻结时之冻胀敏感性，以冻胀率的大小作为分类指标。 它主要受细粒土含量及冻结条件的影响。

9·Widely used for granite, basalt, limestone, river gravel, quartz, iron ore, pebbles and other materials, fine crusher.

广泛适用于花岗岩、玄武岩、石灰岩、河卵石、石英石、铁矿石、鹅卵石等多种物料的细式破碎。