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生態調查
Ecological survey
生態系統
Ecological system
生態臨界
Ecological threshold
生態耐性
Ecological tolerance
生態型
Ecological type
生態價值
Ecological value
生態變化
Ecological variation
魚類生態學
Ecology of fishes
昆蟲生態學
Ecology of insects
經濟分析
Economic analysis
經濟觀點
Economic aspect
經濟植物學
Economic botany
經濟核算
Economic calculation
經濟性狀
Economic character
經濟考慮
Economic consideration
經濟合作
Economic cooperation
經濟合作協議
Economic Cooperation Agreement (ECA)
Agreement between Singapore and the Separate Customs Territory of Taiwan, Penghu, Kinmen and Matsu on Economic Partnership (ASTEP)
Economic Cooperation Framework Agreement (ECFA)
經濟效益
Economic effect
經濟昆蟲學
Economic entomology