differ v. 不一致，不同
例句：They differ widely in their opinions.
例句：It is wrong to differentiate between people according to their family background.
例句：It is important to teach children to discriminate between right and wrong.
indifferent adj. 无关紧要的，不关心的
例句：I was concentrating so hard that I was indifferent to the noise outside.
distinguish v. 区别，辨别
例句：The twins were so much alike that it was impossible to distinguish one from the other.
distinct adj. 清楚的，明显的，截然不同的，独特的
例句：Those two ideas are quite distinct from each other.
distinction n. 区别，差别，级别，特性，声望，显赫
例句：Employers should hire men and women without distintion.
例句：There was a discrepancy in the two reports of the research project.