Dialkyl Quaternaries 二烷基季铵
alro quaternaries 阿耳绕季盐
mono-quaternaries 单季铵盐
quaternaries cation 季铵型阳离子
同义词: four 4 IV tetrad quatern quaternion quaternity quartet quadruplet foursome Little Joe
"a quaternary compound"
同义词: quaternate
"the quaternary period of geologic time extends from the end of the tertiary period to the present"
以上来源于: WordNet
ADJ consisting of fours or by fours 由四个组成的; 四个一组的
N the number four or a set of four 四; 四个一组
词组短语
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