那么信用证的种类又有哪些？他们的各自作用又是为何？
What are the different types of letters of credit and how are they used?
信用证按其作用、形式和机制分作不同的种类。
Letters of credit are classified into different types according to their function, form, and mechanism.
根据情况信用证可以分为很多种类。
Letters of credit can be divided into many kinds depending on the circumstances.
货物种类与信用证一致。
货物种类与信用证一致。
这段话译成中文大概是：“对于备用信用证而言，其可以使用的交易在种类上基本上是没有限制的。
There are virtually no limits to the variety of transactions that the standby credit can serve.
这种信用证（credits），如果你愿意这样称呼的话，将会以一种类似于今天使用的蓝牙技术的方式作用芯片之上还可以离开芯片。
The credits, if you would, would go onto and off of that chip by a method similar to Bluetooth thats used today.
这种信用证（credits），如果你愿意这样称呼的话，将会以一种类似于今天使用的蓝牙技术的方式作用芯片之上还可以离开芯片。
The credits, if you would, would go onto and off of that chip by a method similar to Bluetooth thats used today.
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