例句與用法

1. An improved method for extraction of soil humic acid was used to isolated dissociative humic acid ( ha - i ) and enwrapped humic acid ( ha - ii ) from paddy soil and pohakee peat . quantified and characterized ha - i and ha - ii with 13c nmr , py - gc - ms , optical and elemental analysis . the results indicate that two humic acids are highly different in structure , and ha - ii is more condensed
   采用一種改進的腐殖酸萃取方法從珠江三角洲稻田土壤和pahokee泥炭中分離出了游離腐殖酸( ha - )和包裹腐殖酸( ha - ) ，并采用元素分析、 ~ ( 13 ) cnmr 、 py - gc - ms和有機巖石學方法對ha -和ha -進行了定量和定性研究，結(jié)果表明兩種腐殖酸在性質(zhì)和結(jié)構(gòu)上是有區(qū)別的。