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trophic level
anim.husb.	营养水平
biol.	营养级; 食性层次
ichtyol.	营养的层次
space	营养等级
trophic levels
anim.husb.	营养级
trophic level Any of the feeding levels through which the passage of energy through an ecosystem proceeds; examples are photosynthetic plants, herbivorous animals, and microorganisms of decay
environ.	营养水平 (通过生态系统的能量通道而收益的任何摄食水平，例子包括：光合植物、草食动物和衰变的微生物。)

trophic level : 8 phrases in 4 subjects

Animal husbandry	1
Desert science	1
Life sciences	3
Technology	3