Does each entry require a separate payment?
是否每个作品需要单独地支付 费用?
Yes, each entry requires a separate payment.
是的,每个作品需要单独支付。
Rather than creating a separate instance for each CreditCardAccount, we simply store the credit card number and billing address with the Payment.
我们只是存储Payment所带的信用卡号和账单邮寄地址,并非为每个CreditCardAccount创建一个单独的实例。
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