unforced error

noun

单词	unforced error
释义	unforced error noun DEFINITIONS2 1 in tennis and other sports, an error that is just a mistake rather than the result of pressure from the opponent Anderson began the tiebreak with an unforced error. Submitted from: United Kingdom on 14/07/2016 Open Dictionary - July2016 2 in politics or business, a mistake that is self-inflicted rather than being caused by outside pressure Could this be the unforced error the Republicans have been waiting for? Submitted from: United Kingdom on 14/07/2016 Open Dictionary - July2016 Noun☞unforced error
随便看	by the hour by the minute by the name of something by the numbers by the same token by the scruff of the/someone’s neck by the sound of it/things by the sweat of your brow by the time by the way by turns by virtue of something byway by way of something byword by your own account byzantine by/from all accounts by/in contrast by/in fits and starts by/in leaps and bounds by/through force of circumstances by/through the agency of by/through the back door bête noire