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nitrogen-free [ˌnaɪtrədʒən'friː]
met. 无氮的
nitrogen-free
: 31 phrases in 16 subjects
Agriculture6
Animal husbandry6
Chemistry2
Desert science1
Earth sciences1
Ecology1
Food service and catering2
Geology1
Metallurgy3
Microbiology2
Oil / petroleum1
Oil processing plants1
Polymers1
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Water resources1

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