虽然保兑信用证能够给受益人提供最大的付款保证，但它却因保兑而增加了费用。

虽然保兑信用证能够给受益人提供最大的付款保证，但它却因保兑而增加了费用。
【正确答案】：Although a confirmed credit is able to provide the greatest degree of security to the beneficiary, it involves additional cost as a result of the confirmation.