This flashcard teaches the word "unproductive", meaning not fertile, yielding no results, or not efficient.
此卡片教授单词 "unproductive" 的用法，意为 "不毛的"，"没有产物的" 或 "徒劳的"。
| 单词 | unproductive |
|---|---|
| 音标 | [ˌʌnprəˈdʌktɪv] [ˌʌnprəˈdʌktɪv] |
| 释义 | adj.["不毛的","没有产物的，没有收益的","非生产性的","徒然的，没有效果的"] |
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