addition of nitrogen的用法和样例：
- Air consists chiefly of nitrogen.
- The effect of biosidal treatment of initial sediment,addition of inhibitor and addition of phosphorus on the transform of nitrogen and phosphorus in the sediment-water simulative system were studied.
- Addition of nitrogenous fertilizer promoted the composting progress of CLR.
- The addition of fruit makes the cereal taste good.
- The main reservoir of nitrogen is the atmosphere.
- What is the percentage of nitrogen in air?