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Study of safety problems in gravels and pbbles areas .

卵砾石地区开挖安全问题之探讨。

They may form concentrated pockets in gravels .

它们可能在砾石堆积物中形成富集的矿囊。

It took millions of years to have layers of dusts , sands , and gravels to lay on top of another and solidify .

沙子和碎砾交叠在其他的上面,历经百万年后而凝固。

Joesting has used the magnetometer to locate gold in alaska , taking advantage of the close association of gold and magnetite in gravels .

乔斯丁利用砾石中金子与磁铁矿密切的共生关系，曾经用磁力仪在阿拉斯加寻找金矿。

Earth tone exterior colors mimic the landscape arrangement design ; systematically path , gravels and plants order .

色调车身颜色模拟地球的景观布置设计;系统的路径，砾石和植物秩序。