It can father sewage to get obvious environment benefit and provide city water to solve the conflict of supplying and demanding.
污水回用不但可使污水得到治理，且又可作为稳定的城市水源，既能有效地缓解城市用水的供需矛盾，又能有明显的环境效益。
The domestic supplying and demanding condition of PET filament and staple in 1995 are analysed, and the developing trend and demanding in 1996 and forthcoming are forecasted.
分析了1995年国内涤纶长丝、短纤的供需状况。 预测了1996年及未来几年的发展趋向及需求量。
The market price of coal is under the influence of various factors like supplying and demanding, and the price changes of coal products is becoming more and more complicated.
煤炭市场的价格受供给与需求等多种因素的影响，煤炭产品的价格变化日趋复杂。
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