半透层
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The results further proved that seed semi-permeable layer gradually formed during seed maturation.
再次证明种子半透层是在种子成熟过程中逐渐发育形成的。
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The amplitude of the head fluctuation decreases with the storativity and leakage of both semi-permeable layers and increases with the leakance of the silt-layer.
分析表明，承压含水层中地下水水头波幅是上、下弱透水层贮水率和越流系数的减函数，是淤泥层相对透水系数的增函数；
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