adj.生產(chǎn)的；有成效的；多產(chǎn)的
Their productive cycle covers several decades. 它們的生產(chǎn)周期可延續(xù)幾十年。
Our productive task is making the machine. 我們的生產(chǎn)任務(wù)是造機器。
They work hard, but their efforts are not very productive. 他們很努力，但效率不太高。
I spent a very productive hour in the library. 我在圖書館里的這一小時收獲很大。
He is a productive writer, creating many great works in his life. 他是一個多產(chǎn)的作家，他一生創(chuàng)作了許多作品。
adj.不生產(chǎn)的；非生產(chǎn)性的；沒有收獲的；徒勞的
adj.產(chǎn)生相反結(jié)果的；事與愿違的
adv.多產(chǎn)地；有成果地
adj.反生產(chǎn)的；適得其反的；使達不到預期目標的
