2. We must have patience in doing arduous work. 我们做艰苦的工作要有耐性。
3. He never seeks credit for himself, but is always ready to take on arduous tasks. 他在荣誉面前从不伸手，但在艰巨任务面前却当仁不让。
4. In the past, whole cities grew from the arduous task of cutting and piling stone upon. 过去，整个城市都是由艰辛地切割和堆砌石头发展起来的。
5. Travel was arduous and costly throughout the period, possible only for a privileged class—the same that produced gentlemen scientists, authors, antique experts, and patrons of the arts. 这整个时期里的旅行是艰辛、昂贵的，可能只有享有特权的阶级才能旅行，同样也是这个阶级造就了有教养的科学家、作家、古董专家和艺术赞助人。
