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adj.有用的,有益的,有帮助的;令人满意的; 双语释义:adj.(形容词)有用的,有益的,有帮助的 effective in use, bringing help or advantage[A] 令人满意的satisfactory英英释义: useful[ 'ju:sful ]adj.being of use or service"the girl felt motherly and useful"; "a useful job"; "a useful member of society"同义词:uti