Native wildflower and grass meadows require no fertilizer, little or no supplementalwater, and only annual mowing, once established.
本土的野花地和草场一旦栽植好，不需要肥料，也几乎不需要补充额外的水，只需每年除除草。
2
Results showed that, the environmental water demand almost linearly increased with the pollution loading, and exponentially increased with the pollutant concentration of the supplementalwater.
结果表明，随着污染负荷和补水本底污染物浓度的增加，环境需水量分别成近似线性和指数函数增加；
3
Effluents from other processing plants may also be used as a supplemental source of water.