For any n-layer vertical dike set with contrasts of electric resistivity, a set of equations of coefficients are derived for calculating the electricpotential in the point source field.
对于任意多层不同电阻率垂直岩层，导出了求解点源场电位的系数方程组。
Mother and youngsters on a dike near Kota Bharu, Malaysia, set out to transplant seedlings.
在马来西亚的科塔布鲁附近的一个田坎上，母亲与孩子们着手移栽秧苗。
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