... economic life value 生命的经济价值 Economic Threshold Value 经济阈值 economic book value 经济帐面价值 ...
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threshold value of economic policy 经济政策界限值
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Short term forecast model of disease development and wood loss rate are built. Control guideline and economic threshold value are decided.
建立了病害发生的短期测报模型和材积损失率估测模型，确定了病害的防治指标和经济阈值。
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