(每日一词）dichotomy

Dichotomy /daɪˈkɒtəmɪ/ n. 二元对立

Meaning: If there is a dichotomy between two things, there is a very great difference or opposition between them. 

1) 前缀: dicho- 同di-表示二, dioxide 二氧化物, dilemma 进退两难的境地

2) 词根: tom- 切割, anatomy 解剖

3) 后缀: -y 名词后缀

例句: (常见用法dichotomy between A and B 在A和B之间有对立冲突)

There is often a dichotomy between theory and practice.理论和实践之间常常存在二元对立。

The novel explores the dichotomy of good and evil. 这部小说探讨了善与恶的对立。