例句與造句

1. Chemical analysis of zinc ores concentrates . accurate determination of zinc by complexometric titrimetry after selective extraction of zinc
   鋅礦石精礦的化學分析.鋅選擇提取后用絡合滴定法進行鋅的精確測定
2. Solvent refined a refining technique to improve the quality of based oils using selective extraction of undesirable components by means of solvents
   溶劑精制-利用溶劑作為于段(利用溶劑方式？ ) ，有選擇性地萃取不需要的組份，進而提高基礎油質量的一種精制工藝。
3. Choosing the atomic absorption spectrometry as a basic analytic method and icp / ms as a contrast method and using the sequential selective extraction schedule , the characteristics of weak geochemical signals from deeply concealed deposits were studied in loess covered jiaolongzhang polymetallic deposit and zhangquanzhuang gold deposit
   本文采用原子吸收法作為基本分析方法，并以icp ms為比較方法，通過選擇性循序提取試驗，研究了甘肅蛟龍掌多金屬礦和河北張全莊金礦黃土覆蓋條件下，地表黃土中地球化學弱信息特征。
4. It's difficult to find selective extraction in a sentence. 用selective extraction造句挺難的