我叫陈威璠谁可以靠诉我一写比喻句，并说出他怎样写有什么好处``

There are few earthly things more splendid than a university.In these days of broken frontiers and collapsing values,when dams are down and floods are making misery,when every antient foothold has become something of a quargmire,whereever a university stands,it stands and shines.
这里，把价值观的颠覆＆道德的败坏比作坍塌的堤坝＆决堤的洪水，以此来衬托大学的美好。这是John Masefield的一篇演讲稿，惟妙惟肖。