Talking about the operstion of the letter of credit in business该怎么做，应主要着手什么

论述如何对商业活动中的信用信件进行操作

是要翻译吗？
你句子好像有问题，很不通顺。
如果强硬的翻译过来大概意思是：正在讨论信里面说的有关于商业信用卡的操作的问题。

是不是打错了几处啊!

Letter of Credit

What is a Letter of Credit?

A letter of credit is a banking mechanism which allows importers to offer secure terms to exporters.

All letters of credit contain these elements:

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a payment undertaking given by the bank (issuing bank)
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on behalf of the buyer (applicant)
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to pay a seller (beneficiary)
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a given amount of money
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on presentation of specified documents representing the supply of goods
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within specific time limits
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these documents conforming to terms and conditions set out in the letter of credit
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documents to be presented at a specified place.

Put simply, the issuing bank's