求翻译：在国际贸易中，一般常用的书面合同有销售合同、购货合同、成交确认书、协议、备忘录、意向书、订单等。我国外贸业务中，主要采用的书面合同是销售合同、销售确认书等。是什么意思？

In international trade, commonly used written contracts are sales contracts, purchase contracts, transaction confirmations, agreements, memoranda, letters of intent, orders and so on. China's foreign trade business, mainly in the written contract is a contract of sale, sales confirmation, etc.

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In the international trade, the common commonly used written contract has the sales contract, the purchase contract, the deal certificate of confirmation, the agreement, the memorandum, the intention statement, the order form and so on.In our country foreign trade service, mainly uses the written co

In international trade, common written contract confirmation of sales contracts, purchase contracts, transactions, agreements, memorandums, letters of intent, orders and so on. China's foreign trade business, mainly uses written contracts, such as sales contracts, sales confirmation.

In the international trade, the generally commonly used contract in writing has sales contract, purchase contract, sales confirmation, agreement, memorandum, letter of intent, order,etc.. In the foreign trade business of our country, the contract in writing mainly adopted is a sales contract, sales