求翻译：原因是我们确认收入是根据合同的付款条件，而不是根据项目的完工进度。通常情况下，向客户请求付款时同时需要提供相应请款金额的发票。是什么意思？

The reason is the recognized income is based on the payment terms of the contract, rather than according to the project schedule of completion. Under normal circumstances, the request for payment to the customer needs to provide the appropriate amount of request for payment of invoices.

This is because we recognize that revenue is based on contract, payment terms, and not based on the project's completion. Under normal circumstances, to the customer when requesting payment and you will need to provide the appropriate amount to the invoice.

The reason is we confirmed the income is according to the contract payment condition, but is not finishes the progress according to the project.In the usual situation, to the customer requested when payment simultaneously needs to provide invites the funds amount correspondingly the receipt.

Because we recognize revenue is based on the payment terms of the contract, rather than on the completion of the project. Under normal circumstances, advise the customer of when payment is requested at the same time of the need to provide the appropriate amount of invoice.

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