population n composition 人口构成 ; 人口组合
grain n composition 粒度组成
Italian n Language and Composition 意大利语言文化
composition of organic n 有机氮组成
This testified that the main composition of TN is organic n.
证明全氮的主要成分是有机氮。
In their elementary composition, the enzymes show the usual proportion of c, h, n, and s found in proteins.
从元素组成来看，酶显示出与通常蛋白质一样的碳，氢，氮及硫的元素比例。
The result of XPS experiment has proofed that the performance changed of the Fe-O, Fe-N-O films is because the composition and structure of film has changed after heat treatment.
XPS实验结果证明薄膜性能改变的原因是热处理后薄膜的成分与结构发生了明显的变化。
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