While some struggle to create new lives on the Frontier, others are rewarded with riches on a scale never seen before, as the world rushes in to mine California's gold.
当这个世界陷入加利福尼亚金矿开采热时，一些人正竭力在边境创造新的生活时，另外一些人则在很大程度上拥有了前所未有的财富。
The mine subsidence disaster discipline is the frontier crossing branch of science among geology, ecology, mining, rock soil mechanics, information science, management science and sociology.
矿山沉陷灾害科学是地质学、生态学、采矿学、岩土力学、信息科学、管理科学和社会学之间的交叉边缘学科。
The mine subsidence disaster discipline is the frontier crossing branch of science among geology, ecology, mining, rock soil mechanics, information science, management science and sociology.
矿山沉陷灾害科学是地质学、生态学、采矿学、岩土力学、信息科学、管理科学和社会学之间的交叉边缘学科。
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