sum相关的词根或词缀是: sumsumm sumsumpt

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Councils and development agencies more than matched that sum .

议会和开发机构花的钱比这还多。

I sold clothes for 10 days to save that sum .

我卖了10天的衣服才攒出这些钱。

Private , government and foreign balances must sum to zero .

私人部门、政府和外汇收支差额的总和必须为零。

Such a combination could be more than the sum of its parts .

这样一种结合的作用，比它的各单个部分的总和还要大。

I am the sum of all my experiences , both good and bad .

我的人生是所有经历的总和，无论是成功的还是失败的。