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nitrate-nitrogen
water.res., ecol. 硝酸盐-氮; 硝态氮
nitrate nitrogen
agric. 硝酸盐氮 (MNO₃)
agric., chem. 硝态氮
ecol. 硝酸盐氮
nitrate-nitrogen
: 8 phrases in 4 subjects
Desert science1
Ecology2
Technology2
Water resources3