“economic threshold”的概念、定义、翻译、参考文献-科学参考

单词	economic threshold
释义	economic threshold Encyclopedia 农学经济阈值释 economic threshold; ET经济阈值采用防治措施阻止害虫种群密度增长，以免达到经济损害允许水平的虫口密度。又称防治指标、防治阈限。
随便看	photometric data system photometric diameter photometric distance photometric double star photometric element photometric ellipticity photometric error photometric index photometric instrument photometric instruments photometric measurement photometric measurement method photometric method photometric night photometric orbit photometric paradox photometric parallax photometric period photometric phase photometric precision photometric redshift photometric scale photometric sequence photometric solution photometric standard

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