孜孜不倦

persevere

1. 他天天孜孜不倦地埋头苦干，直到工程竣工为止。
   He kept banging away at his work day by day, until eventually the project was finished.
2. 我们的总理孜孜不倦地为人民工作。
   Our Prime Minister is unwearied to work for people.
3. 刻苦努力和孜孜不倦是成功的梯阶。
   Hard work and long hour is rungs in the ladder of success.

不倦的英语翻译：