动词短语
中文翻译：计算
同义词：
['calculate', 'compute', 'reckon']
例句：
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1.We need to back calculate the cost of materials before starting the project.
在开始项目之前，我们需要先计算材料的成本。
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2.The company back calculated its profits for the year.
该公司为这一年的盈利进行了核算。
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3.He back calculated his expenses and found that he had overspent by $500.
他重新核算了开支，发现比计划多花了500美元。