The money paid for mineral right is composed of the re assessed exploration cost, exploration average profit, a little absolute differential rent and the first differential rent.

矿业权价款由勘查重置成本及其平均利润，再加少部分绝对矿租和第一形态级差矿租构成。

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But they expect serious scientific and public-policy issues to be properly assessed, not massaged away by slick marketing and public relations in the interests of private profit.

ECONOMIST: Letters