但是，建造大型涡轮机并且把它牢牢地固定在海底费用巨大，因此风力发电被限制在浅海一带。
But building a massive turbine and anchoring it firmly to the seafloor is expensive. So wind power is restricted to shallow seas.
矿床产于中泥盆统西汉水群安家岔组浅海相碎屑-碳酸盐沉积建造中。
The deposit is located in clastic-carbonate sedimentary formation of neritic facies, the Middle Devonian Xihanshui Group Anjiacha Formation.
含矿建造的有机地球化学研究表明：主岩富含原生有机质，其沉积环境为还原一强还原的浅海低洼海盆。
The studies of organic geochemistry on the ore-bearing formation show that the host-rock is rich in primary organic matters and the sedimentary environment is low basin in the epicontinental sea.
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