Letters of intent, however, normally state the basic terms of an agreement, but leave the finer details for later.

意向书往往对协议的基本条款进行说明，但具体细节要留待将来再进一步完善。

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There are three basic types of written agreements, depending on the language of the agreement: agreements to agree, letters of intent, and a fully defined, binding agreement.

按照协议用语，书面协议分为三个基本类型：协议将来达成协议（agreement to agree）、协议意向书、以及说明详细且具备约束力的协议。

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With letters of intent, it is critical that you understand whether the agreed terms are immediately binding or if there will be no binding agreement until all terms are nailed down.

对于协议意向书，至为关键的是，你需要搞清楚，协议条款是立即生效，还是说在最后条款最终确定之前并不存在任何具备约束力的协议。

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Congratulations, you young athletes who faxed your letters of intent to your college football destination of choice on National Signing Day!

FORBES: My Congratulatory Message To The National Signing Day Youth

Having refined and validated its design, it began accepting letters of intent for its first 40 planes in the last few weeks of 2007.

ECONOMIST: Business jets

The new agreement with the IMF also said the Indonesian government would take the initiative as to the contents of future draft letters of intent rather than the IMF as before.

BBC: Indonesia signs new IMF deal