adj.生产的;有成效的;多产的
Their productive cycle covers several decades. 它们的生产周期可延续几十年。
Our productive task is making the machine. 我们的生产任务是造机器。
They work hard, but their efforts are not very productive. 他们很努力,但效率不太高。
I spent a very productive hour in the library. 我在图书馆里的这一小时收获很大。
He is a productive writer, creating many great works in his life. 他是一个多产的作家,他一生创作了许多作品。
adj.不生产的;非生产性的;没有收获的;徒劳的
adj.产生相反结果的;事与愿违的
adv.多产地;有成果地
adj.反生产的;适得其反的;使达不到预期目标的