The permeability of a soil is important for calculations of underground flow.
土的渗透性对于地下液流的计算很为重要。
They hold soil in place during rains and ease the water flow.
大雨侵袭时，这些作物可以保持土壤，减缓水流。
Too much mulch can restrict oxygen and water flow to the soil and harm roots.
太多的盖土会阻止氧气和水流入土壤，同时还会对根系有害。
Debris flow is a kind of water and soil loss in nature.
泥石流是一种特殊的水土流失现象。
Debris flow is a kind of water and soil loss in nature.
泥石流是一种特殊的水土流失现象。
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