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n.四个一组（quaternary的复数）
1、quaternary food chain───第四纪食物链
2、quaternary book───第四纪书籍
3、quaternary───n.四；四个一组；adj.[数]四进制的；四个一组的
4、quaternary structure───[生物物理]四级结构
5、quaternary era───第四纪
6、quaternary period───第四纪
7、quaternary structure of proteins───蛋白质的四级结构
1、Synthesis and properties of quaternaries ammonium cationic surfactants derived from nonylphenol───壬基酚衍生的季铵盐阳离子表面活性剂的合成及性能
2、Application of the gemini quaternaries containing ester- bond surfactants in the determination trace aluminium───酯型双子季铵盐表面活性剂在微量铝测定中的应用
3、The Quaternaries are three in number - this means that the 12 signs of the Zodiac are divided into three categories of four signs each.───季胺盐是在数量上-这意味着12生肖迹象划分为三个类别，每四个标志。
4、The size and distribution of the pigment particle can control by addition of fatty quaternaries in synthesis of pigment and its marker bronzing can be eliminated.───在颜料合成过程中添加含脂肪链季铵盐衍生物可控制颜料粒径大小与分布，可消除铜光现象。