applying nitrogen amount的用法和样例：
例句
- Chlorophyll content had no significant relation with the net assimilation rate, but was related to the nitrogen content and the specific leaf weight.
叶绿素含量与净同化速率间没有显著关系，但与含氮量和比叶重有关。 - The effect of Re element addition on the nitrogen content in the weld was insignificant due to the oxidization from the early deoxidization stage.
而由于稀土元素在先期脱氧中大量氧化，其脱氮效果较弱，稀土元素对熔敷金属的总含氮量的影响不显著。
