fruitless
adj.没有成果的,无益的;不结果实的;不成功的;白搭
网络解释.不结果实的;毫无结果;无效的;无结果
adj.1.不毛的释义下的同义词
unfruitful barren infecund unproductive infertile unprolific sterile
2.徒劳的释义下的同义词
naught ineffective futile unprofitable unsuccessful useless worthless gainless unremunerative bootless ineffectual vain unyieldi
beneficial