| 单词 | mental arithmetic |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔arithmetic〕I did some quick mental arithmetic and decided it was going to cost too much.我快速心算了一下，觉得费用会太高。剑桥高阶〔mental arithmetic〕I did a quick bit of mental arithmetic.我很快地心算了一下。朗文当代〔mentally〕Practise mental arithmetic when you go out shopping.外出购物的时候练习一下心算。柯林斯高阶He did some quick mental arithmetic and then checked his answer on the calculator.他快速地心算了一下，然后用计算器把答案核对一遍。剑桥国际He is good at mental arithmetic. 他擅长心算。译典通I always use a calculator when I add things up because I've never been any good at mental arithmetic.我做加法时总用一个计算器，因为我对心算从不精通。剑桥国际 |
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