英语词汇“unsuccessful”的释义、区别辨析及用法例句-英语同义词词典

单词	unsuccessful
例句	unsuccessfulunsuccessful /ˌʌnsəkˈsesfəl/ adjective ► unsuccessful not succeeding in doing something. You use unsuccessful especially about attempts to do something which have failed: The prisoners made an unsuccessful attempt to escape from the jail. We tried to find out where the noise was coming from, but were unsuccessful. ► ineffective something that is ineffective does not do what you want. You use ineffective about drugs and methods that do not work: The medicine proved to be ineffective against the disease. ► useless not helpful or useful at all. Useless sounds much stronger and more informal than ineffective: The instructions they gave me were useless. I couldn't understand them at all. It is useless telling him he is wrong. He never listens to anyone. ANTONYMS ➔ see successfulADVERBS: unsuccessfulYou can make the adjectives that mean unsuccessful into adverbs by using an -ly ending: We tried unsuccessfully to find out where the noise was coming from. \| My broken arm hung uselessly at my side.
随便看	astonishment astronomy at ease at fault at high speed athlete athletic at home with at large atlas at last atmosphere at no extra cost at no time at once at present attach attack attain attempt attend attendance attention at that point at that stage

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