但低水平的当前生产力准确的说明了它为什么会对投资者产生如此之大的吸引力——伴随着边际效益的增加而取得较高的回报。
But low levels of current productivity is precisely why many wish to get in here — to achieve the superior returns that accompany increases in marginal revenue.
金融产业将不会在短期内改回额外的边际要求，并且即使那样，投资者也不会立即认为意大利的债务是“毫无风险的”。
The finance industry will not soon reverse its extra margin call and even if it did, investors are not about to treat Italian debt as "risk free".
而大量的边际气田一般为地处偏远的海上中小型气田，如采用常用的固定式平台进行开发，收益较低，风险太大，对投资者无足够的吸引力。
If these gas fields are developed by use of the common fixed platform, the profits will be relatively low and risk great, having no sufficient appeal to the investors.
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