But he is not entitled to enforce payment of the bill against any intervening party to whom be was previously liable.
但对于其先前有付款责任之任何中间当事人，则前述当事人无权要其就汇票付款。
If a class wants to associate with the super Payment class, the DB can't use referential integrity to enforce it; you have to use a trigger to do so.
如果一个类想和Payment超类关联，数据库无法使用引用完整性(referential integrity)来实现它；必须使用触发器来实现它。
It may be an expensive lesson, but it may actually be better to just pay the debt off yourself rather than hook yourself into a payment arrangement that requires monthly contact to enforce.
有可能是一个昂贵的教训，可是有可能自己将债务偿还而不是让自己陷入一个付款需要每月联系的…解决方法更好。
It may be an expensive lesson, but it may actually be better to just pay the debt off yourself rather than hook yourself into a payment arrangement that requires monthly contact to enforce.
有可能是一个昂贵的教训，可是有可能自己将债务偿还而不是让自己陷入一个付款需要每月联系的…解决方法更好。
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