英语词汇mental arithmetic的意思、用法及释义-英汉双解词典

单词	mental arithmetic
释义	mental arithmetic calculation(s) done in the mind, without writing down figures or using a calculator, etc 心算.
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英汉双解词典包含38652条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。