ni·tro·gen fix·a·tion
noun/ˈnaɪtrədʒən fɪkseɪʃn/
/ˈnaɪtrədʒən fɪkseɪʃn/
[uncountable]- the chemical process by which nitrogen from the atmosphere is changed by bacteria into compounds in the soil that plants and other living things can use, especially as part of the nitrogen cycle
细菌将大气中的氮转化为土壤中植物和其他生物可以利用的化合物的化学过程，特别是作为氮循环的一部分