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to phrases
concentration level
avia.
浓度级
ecol.
富集水平
;
浓缩水平
tech.
浓度水平
concentration level:
24 phrases
in 9 subjects
Animal husbandry
1
Aviation
1
Earth sciences
2
Ecology
2
Electronics
1
Metallurgy
2
Technology
11
Water resources
2
Wind Energy
2
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