unfruitful
adj. 不结果实的;无效果的;不生子女的;徒然的
例句
Stop unfruitful effort.
停止无谓的努力。
Here's a day trip that looked unfruitful, but turned out alright in the end.
这里的行程,仿佛徒劳的,但原来在哪里结束。
Cor. 14:14 For if I pray in a tongue, my spirit prays, but my mind is unfruitful.
林前十四14因为我若用方言祷告,我的灵就祷告,我的心思却没有作用。