我保证付款不会迟于6月底。
I give you my word that the payment will be made not later than the end of June.
即便供应商充分履行了其职责，也不能保证付款(除非是预付款)。
Payments are not guaranteed even if a supplier has duly performed its duty (unless it is payment in advance).
“承兑汇票”这一术语的含义是买方作出承诺在见票之日后60天保证付款。
The term of "accept a draft" means that the buyer promises to pay the money on the 60th day after the date of seeing the draft.
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