firm and indomitable; grittiness; persistent and dauntless; stick-at-itiveness

1. 她有非凡的自立的精神和堅韌不拔的精神。
   She have an unusual degree of self-reliance and mental toughness.
2. 你可以不喜歡他，但你不得不佩服他那種堅韌不拔的精神。
   You may not like him, but you have got to admire his persistence.
3. 憑著堅韌不拔的精神，他終于成為冠軍。
   He became a champion at last in virtue of his perseverance.

堅的英語翻譯：

不的英語翻譯：

拔的英語翻譯：