英语词汇mental-arithmetic怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	mental-arithmetic
释义	mental arithmetic noun /ˌmentl əˈrɪθmətɪk/ /ˌmentl əˈrɪθmətɪk/ [uncountable] adding, multiplying, etc. numbers in your mind without writing anything down or using a calculator心算
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mental arithmetic