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1.The cost to build a hydroelectric dam is very low. 2.It will cause little pollution to the environment to build a bydroelectric dam. 3.The building of a hydroelectric dam will do little harm to animals.
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成本的英文：cost参考例句：Genetically engineered seed costs more.转基因种子的成本更高。profits proportionable to expense.利润与成本相称The cost problems will become self-evident.成本问题就会一目了然了。How do I minimise the cost?我如何实现成本最小化?The introduction of production costs at different points in the manufacturing process.成本在生产过程中的流动情况We reduced resource costs by over 93%!我们减少的资源成本超过 93%!The data of activities, cost pools and volume of drivers are shown as Exhibit 16-5.作业、成本库和成本动因数量如表16-5所示。Such cost-saving measures could be crucial to future growth.这样的成本降低，对于未来的成长十分关键。Of course, the best thing, from both a cost -saving and an environmental point of view, would be not to print at all.当然，最好的节省成本和环保的方法是不再打印。The fact was that expropriation seemed to magnify costs and reduce productivity.实际情况是，这些企业在收归国有以后，成本增加而生产率却下降了。
