这句话是肯定句还是否定？我都看傻了

来源：百度知道 编辑：UC知道 时间：2024/05/16 11:56:49
No payment can be made unless an unqualified PO acknowledgement (either an executed copy of the PO or a written PO Acceptance) has been received along with the required Contractual Guarantees required by the PO.
注：PO是PURCHASE ORDER
好心人帮忙翻译一下啊

除非无条件的认购书(生效的复印件或书面认购书)连同认购单要求的合同保证一同被收到,否则拒绝付款.

除非一份尚未启效的采购单承诺（一份已生效采购单的复印件或是书面采购单）和其所需的合同保证书一起收到时，才能付款．