useless /ˈjuːsləs/ adjective Learner's definition of USELESS
[more useless; most useless]
: not at all useful : not doing or able to do what is needed无用的;无价值的 : not producing or able to produce the effect you want无效的;徒劳的 -
I made a useless attempt at fixing the leak.我试着想补上漏洞,但一点效果也没有。
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It's useless trying to change her mind. = It's useless to try to change her mind.要改变她的想法根本就是徒劳。
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Drugs are useless in treating the condition.医治这种病,药物是不起作用的。
— uselessness
noun [noncount]