unproductive
/ˌʌnprəˈdʌktɪv/adjective
1- not producing or able to produce large amounts of goods, crops, or other commodities生产不多的; 不能多生产的; 不丰饶的：
unproductive land must be reforested.
贫瘠土地必须再植林。
1.1
- (of an activity or period) not achieving much; not very useful（行动, 时期）成果不多的; 无用的：
unproductive meetings.
徒劳的会议。
派生词