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balanced harvest of fisheries
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balanced harvest of fisheries
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渔业平衡收获
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balanced harvest of fisheries
渔业平衡收获
根据水域生态系统中的种类、种群或个体大小的生产力水平而进行的适度捕捞。不仅仅是有选择性地捕捞大个体或经济价值高的种类。
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medical prescriptions in Cave 20, Longmen Caves
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medical prevention of military operation in hot environment
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