nitrogenasen.[生化]固氮酶
nitrogenn.氮
Nitrogen partitioning氮分配
nitrogen and phosphor氮磷营养
Nitrogen accumulation氮素积累
nitrogen preservation充氮保藏
Nitrogenous nutrition氮营养
nitrogen assimilation氮素同化,氮同化
nitrogen displacement氮气置换
nitrogen transferring氮转移
nitrogen mon-oxidum一氧化氮
nitrogen gas cylinder氮气容器