fruitless flower不结果的花;植株的雄性花;无效花
fruitless hoops无底洞
Fruitless labor白费劲;空自劳苦
fruitless demand毫无结果的要求
fruitless task徒劳无果的工作;徒劳的工作
fruitless march无结果的行军
Fruitless Jackdaw徒劳寒鸦
Fruitless Competition水珠溶入水珠
fruitless gene不育基因;无效基因
ADJ（形容词） Fruitless actions, events, or efforts do not achieve anything at all. 无结果的
It was a fruitless search.
那是一次毫无结果的搜寻。