It's hard work but if you hang on you'll succeed in the end.
《新英汉大辞典》
2
但他对其深爱的雪莱和拜伦的新近评著的关注坚持不渝。
He never failed to keep up with the latest works on his great loves, Shelley and byron.
3
马克思热爱数学,几十年坚持不渝地利用闲暇时间学习数学,留下了近千页的数学手稿。
K. Marx had deep love for mathematics. For decades, he persisted in studying mathematics at leisure, taking nearly one thousand pages of mathematical notes, which still remained.