| 单词 | useless |
| 例句 | useless adjective 1.•useless attempts:futile, to no avail, (in) vain, pointless, to no purpose, unavailing, hopeless, ineffectual, ineffective, to no effect, fruitless, unprofitable, profitless, unproductive | archaic bootless. ANT useful, beneficial. 2.•useless machines:unusable, broken, kaput, defunct, dud, faulty. 3.informal •he was a useless worker:incompetent, inept, ineffective, incapable, unemployable, inadequate, hopeless, no-account, bad | informal pathetic. ANT competent. |
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