producing no useful results synonym unproductive opposite fruitful没有成果的;无成效的;徒然的 Extra ExamplesAll the signs were that this was going to be a fruitless exercise. 所有迹象表明,这将是一次毫无结果的演习。 He abandoned his fruitless attempts to get his poems published. 他放弃了出版自己诗作的徒劳尝试。 He returned home after weeks of fruitless negotiations. 他在进行了数星期毫无成果的谈判后回家了。 They were three weeks into an apparently fruitless investigation. 他们进行了三个星期显然毫无结果的调查。
Oxford Collocations Dictionaryverbs- be
- prove
- seem
- …
- completely
- utterly
- largely
- …