NP中的每个问题都可以归约为可满足性问题,这是计算复杂性理论的基石。
We wish to discuss a structure for salt of deoxyribose nucleic acid. This structure has novel features which are of considerable biological interest.
我是一个普通人,只是碰巧网球打得好。
The psychologist must avoid all forms of mental physics.