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氮源
desert. N source
met. nitrogen source
space nitrogen resupply
tech. nitrogen source (物质)
氮源物质
anim.husb. nitrogen source
氮源[物质]
agric. nitrogen source
氮源
: 17 phrases in 9 subjects
Agriculture2
Animal husbandry6
Desert science2
Ecology1
Electronics1
Metallurgy1
Sports1
Technology2
Water resources1