iron manganese concretion

常見例句

雙語例句

• The curve model can express well the relation between silt content, sand content, slope deposit depth, iron-manganese concretion depth , all the soil fertility properties and terrain.
  其中，對數(shù)模型能夠?qū)ν翆雍穸取⒄沉：颗c地形的關(guān)系進行最優(yōu)擬合；
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