您要查找的是不是：
- 强NP-难strongly NP'hard
- 强powerful
- 难problem
- 强的strong
- 为难make things difficult for
- 难的hardy
- 要强eager to excel
- 很难very difficult
- 最强ff [fortissimo]
- 两难be in a dilemma
- 强人strong man
- 难过的sorry
- 很强ff
- 好强eager to do well in everything
- 难看的malformed
- 不难It's no big deal.
- 责任心强responsible
- 世界500强500 tops of the world
- 万事开头难It is the first step that costs troublesome
- 刚强unyielding
