每个会计期末都要结清收入和费用帐户。

Revenue and expense accounts are closed at the end of each accounting period.

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事务类型用于根据业务或产品组分组收入和费用项目。

Transaction types are used to group revenue and expense items according to business or product groups.

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这种方法核算收入和费用时有两个重要规则。

There are two very important rules about income and expenses in this method of accounting.

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