unproductive
- adj. 非生产性的；徒劳的；不毛的；不生产的
考试真题
- since African agriculture is still broadly unproductive, food is imported, consuming a portion of revenue.
2017年12月四级真题（第三套）阅读 Section C
- If we weren't on our devices,we'd likely do something similarly unproductive.
2017年12月六级真题（第一套）阅读 Section B