对这三种土壤而言，乌栅土的各土层的平均流量最小，穿透时间最长。
Among the three soils, the average flow velocity of Wushan soil was the smallest and the breakthrough process was the longest.
对这三种土壤而言，乌栅土的各土层的平均流量最小，穿透时间最长。
Among the three soils, the average flow velocity of Wushan soil was the smallest and the breakthrough process was the longest.
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