Recently, more and more attentions are given to how to make full use of spirulina in the process of sewerage and exhaust gas disposal, et al.

近年来人们越来越关注如何在污水处理、废气处理等过程中充分利用和培养螺旋藻。

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The selection of the disposal methods of municipal sewage and the way of seperation of the old combined sewerage system need to be discussed and studied.

城市废水出路的安排和合流制沟道系统的分流化是两个需要深入研究的课题。

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More people have put increased strain on the islands' water supply, sewerage and waste disposal, not to mention its fragile wildlife.

ECONOMIST: The Galapagos Islands show the mixed blessings of greenery