/ˌʌnprəˈdʌktɪv/ adj.1.(not productive of anything)不产生的
unproductive of sth不产生某物的
2.【经】+ factory不生产的；+ land不毛的；贫瘠的
There were 70 million acres of increasingly unproductive land.有7,000万英亩土地越来越贫瘠。
3.(not achieving much)+ day, discussion, meeting无成效的；无收获的；一事无成的
The meeting was unproductive.会议未取得成果。
Research workers are well aware that much of their time and effort is unproductive.研究工作者清楚地知道, 他们付出的大部分时间和努力都白费了。