By means of multielement analysis, 7 character indexes of 49 breeding material had been made by a main composition and cluster analysis in malting barley.
利用多元分析法对49个二棱型啤酒大麦育种材料的7个主要性状指标进行了主成份分析与聚类分析。
Quadrupole mass spectrometer can be used in measuring pressure of dividing and analysis composition of material.
四极质谱计在真空技术中可用来测量分压强，从事物质成分的分析。
How to analyze question and decide on main idea in terms of new material composition is an important problem worth deep analysis and exploration.
近年来最常见的新材料作文如何审题立意是需要深入分析探讨的重要问题。
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