1. Tired, but not discouraged, as the result of the fruitlessness of his efforts, CRC returned to Germany, where he built a house in which he could quietly carry on his study and research.
累了，但并不气馁作为他的努力是徒劳的结果，华润返回德国，在那里他建立了一个房子，他可以安静地继续他的学习和研究。
2. One evening, Marius was speaking in the presence of Cosette and Jean Valjean of the whole of that singular adventure, of the innumerable inquiries which he had made, and of the fruitlessness of his efforts.
有一天晚上，马吕斯在珂赛特和冉阿让面前谈起了这桩离奇的遭遇以及他进行的无数得不到结果的查询。
3. Nothing has characterized the fruitlessness of the hunt for the al-Qaeda leader so much as the recurrent — and mostly inaccurate — reports that he is seriously ailing, or even at death's door.
没什么能比那些重复且不准确的报告更能说明追捕基地组织老大的行动有多么失败了——说什么拉登病重或者病危。2002年，巴基斯坦总统穆沙拉夫说拉登有肾病，并需要依赖透析机过活。
4. With such fragile foundations, that rapprochement could quickly falter as a result of mounting domestic criticism of its fruitlessness or an accident that unleashes the mutual animosities bubbling underneath in both societies.
根基如此脆弱，如果国内批评这种友好毫无成果的舆论升温，或一次意外释放出植根于各自社会中的相互仇恨，两国之间的友好关系可能会迅速瓦解。
noun
1. the quality of yielding nothing of value
Synonym: aridity barrenness
2. a lack of creative imagination