sum
B2学术词 AWL-4高频 NGSL-2英 /sʌm/美 /sʌm/
释义
noun
金额;总数
an amount of money
“You will be fined the sum of £200.”
verb
真实视频例句
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“Which, if you sum up those mistakes,”
如果你把那些错误加起来,
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