我们已经收到编号为456信用证修改件的翻译：We have received the number 456 letter of credit amendment 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

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We have received the number 456 letter of credit amendment

We already received the serial number were 456 letters of credit revise

We have already received letters numbered 456 revisions

We have received the number 456 letter of credit amendment