单词	mental arithmetic
释义	mental arithmeticˌmental aˈrithmetic noun [uncountable] Examples EXAMPLES FROM THE CORPUS A quick bit of mental arithmetic was enough to make Chrissy weak at the knees. the act of adding numbers together, multiplying them etc in your mind, without writing them down:  I did a quick bit of mental arithmetic.
随便看	promontory promote promoter promotion promotional prompt prompter promptly promptness Proms promulgate promulgation promulgator pron. prone proneness prong pronged pronominal pronominally pronoun pronounce pronounceable pronounced pronouncedly

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