在农业科技类图书中经常出现“脂、酯”“氨、胺、铵”“磷、膦”混用的现象，笔者在查阅了有关资料后，将上述几组字词区别如下： １．脂和酯 生物体内不溶于水而溶于乙醚、苯、四氯化碳等有机溶剂的化合物统称脂类。也就是说“脂”字是一个总的概念，一般用脂字的有“油脂” In agricultural science and technology books often appear “fat, ester,” “ammonia, amine, ammonium” “phosphorus, phosphine” mixed phenomenon, the author in the access to the relevant information, the above several groups of words are as follows: 1. Fat and ester organisms insoluble in water and soluble in ether, benzene, carbon tetrachloride and other organic solvents compounds collectively referred to as lipids. In other words, “fat” word is a general concept, the general use of fat words are “fat”