| 正面 | unproductive |
|---|---|
| 背面 | 【考法1】adj.徒然的，无效的: not productive; idle 【例】her attempts to write a novel have been unproductive 她一直想息写本小说的努力只是徒然 【近】abortive, barren, fruitless, otiose, profitless, unavailing, unprofitable, unsuccessful, useless, vain 【反】deadly, effective, effectual, efficacious, efficient, potent, productive, profitable, successful, virtuous, telling 有效的 |
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