【Key words】 urban hydro-ecology； stormwater utilization； spot utilization； focus utilization； eco-purifiction； healthy circulation；
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利用集中对数似然函数 concentrated log-likelihood
此外，还可以促进土地的集约集中利用。
我们应该集中精力寻找有效利用有限资源的方法。
We should focus on finding methods of making efficient use of limited resources.
然而，另一些人则采纳了这样一种理念，即最好是在仍然有利可图之时利用水，并集中用在棉花等高价值作物上。
Others, however, have adopted the philosophy that it is best to use the water while it is still economically profitable to do so and to concentrate on high-value crops such as cotton.
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