adj.不毛的;没有产物的,没有收益的;非生产性的;徒然的,没有效果的;
例句:
Shifting gears when relationships are unproductive.
改变无效关系的变通方式.
The talks between labor and management were unproductive.
工人与管理层之间的对话毫无效果.
You rarely waste energies on unproductive activities.
你很少浪费你的能量在无谓的活动上.