To date, economic liberation of hydrocarbon gases from hydrates has not occurred, but hydrates contain quantities of hydrocarbons that could be of great economic significance.
迄今，从水合物中经济地采出烃类气体尚未实施，但水合物所含烃类的数量却有很大的经济意义。
2
Choose dark tea products with large quantities. Because of the relatively low prices, they can greatly relieve your economic pressure.
选用生产批量大的茶品。批量越大，一般来说市面价格就低，收藏起来经济压力相对而言就要小一些。
3
Under the background of the bill of quantities standard implements, how to completes tender document, reduced economy claim, favors maintains owner's economic interest.