未经消化的二级生活污水处理厂脱水污泥含氮4.12%，其中有机态氮占93%。
Undigested dewatered domestic sewage sludge from secondary treatment plant contained N 4.12%, of which organic form of N accounted for 93%.
与二态网络相比，随机流量交通网络更适于描述现实生活中的交通系统。
Compared with two modes network, the stochastic-flow traffic network is more suitable for describing the transportation system in the real life.
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