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相当于荥阳外面的一道屏障，一旦失去了荥阳的防御能力会大大折扣，因此必须要尽量保住。Bridging mode is to separate things from their concrete implementation so that they can change independently. The purpose of bridging is: Decoupling abstraction and implementation, So that the two can be changed independently, Like our commonly used JDBC bridge DriverManager, when JDBC connects databases, it switches between databases without moving too much code or even at all. The reason is that JDBC provides a unified interface, each database provides its own implementation, and a program called database driver is used to bridge. Let's look at the diagram:白鹤衔起了花无缺的衣角。06　日英同盟俗谚虽有云“虎父无犬子”，但对于楚氏两父子来说的确有点牵强，因他俩不论性格、对人处事、甚至人生目标都是南辕北辙。父亲楚帆(陈锦鸿饰)由内到外尽是六十年代情怀、儿子楚慈(吴卓羲饰)则嫌自己活在廿一世纪步伐还太慢；一个跨时空、跨时代的时装喜剧，当中发生的情节不单使人百般回味，更让人悟思到“将相本无种，男儿当自强”的硬道理。科学家艾莉·爱罗薇从小就对外太空感兴趣，并用无线电接收其他地域和空间的信号。长大后，她成了一名从事外太空生命搜索的专家。她对宇宙生命充满探索欲望，尤其是对她产生深远影响的父亲去世后，她对科研的投入更加上了对父亲的强烈怀念。　　相传清朝末年的皇族端王，曾收敛了一大批财宝并隐藏起来，后因他得罪慈禧太后被满门抄斩，只留得一个幼女碧云格格随唱堂会的“庆生班”逃走。从此，民间和各方势力都想尽办法，欲寻获这批财宝。