例句與造句

1. Then by methods of fractionation of inorganic and organic p in soils and multivariate statistical analysis , this paper discussed phosphorus fractions in soils with three fertility levels and in different soil layers . the affecting factors on fast - available p ( avail . p ) were also related
   在此基礎(chǔ)上，用無機磷分級和有機磷分組方法、多元統(tǒng)計分析的方法，研究了石灰性土壤不同肥力與不同土層中磷素的各種形態(tài)含量差異以及影響速效磷的因素，結(jié)果如下： 1
2. It's difficult to find method of fractionation in a sentence. 用method of fractionation造句挺難的