Mr Heydon says it is because the ROV technology has only recently become capable enough.
海登说，这是因为ROV技术只是在最近才得以真正用于实战。
All of this can be done, Mr Heydon believes, for about half as much as opening a new landbased mine.
海登相信，只要花费相当于一个陆地矿井一半的费用，所有这些就都可以实现。
All of this can be done, Mr Heydon believes, for about half as much as opening a new land-based mine.
海冬相信，只要花费相当于一个陆地矿井一半的费用，所有这些就都可以实现。
David Heydon, the boss of Nautilus, says that his firm's underwater samples, which are literally cut and lifted off the sea floor, contain 10% copper.
鹦鹉螺公司老板大卫•海冬说，他们公司开掘并运出海底的水下样品却包含百分之十的铜。
David Heydon, the boss of Nautilus, says that his firm's underwater samples, which are literally cut and lifted off the sea floor, contain 10% copper.
鹦鹉螺公司老板大卫•海冬说，他们公司开掘并运出海底的水下样品却包含百分之十的铜。
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