源自欧洲寓言名著的英文典故

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1.a dog in the manger 占着茅坑不拉屎的人

出自《伊索寓言》(Aesop's Fables)，有一篇狗站马槽的故事，说的是一头狗躺在堆满稻草的马槽里，狗是不吃草的动物，而当马或牛一走进稻草时，这头狗却朝着马，牛狂哮，不准食草动物享用。因此，“狗站马槽”就成了一个家喻户晓的成语而进入英语中，常用来比喻a person who prevents others from enjoying sth that is useless to himself; a churlish fellow who will neither use a thing himself nor let others use it，讽刺那些占据说职位或某些物质却不做事的人。
a dog in the manger是个名词性短语，常与系动词连用，充当表语（主语补足语）
eg:He borrowed a lot of books from the library,but he didn't read a book.He was really a dog in the manger.
There are some officials who are only the dogs in the manger.
Smith was a dog in the manger over that roll of wire;it was no use whatever to him,but he wouldn't let us have it.

2.bell the cat 自告奋勇去冒险；老虎头上拍苍蝇
bell the cat系成语to hang the bell about the cat's neck的简略，愿意是“给猫的脖子上挂铃”。它来自《伊索寓言》(Aesop's Fables)中的《老鼠会议》(The Mice in Council)
这篇寓言讲的是：一群老鼠在鼠洞里举行会议，讨论如何对付凶狠的猫。白胡须老鼠提出：“我有个方法，在猫的脖子上挂一个铃。这样，猫一走动铃就响，我们就可以闻铃声而逃避了”，群鼠一致同意这个建议，欢呼：“That's a capital idea.We will bell the cat!No more fear of the cat!”但是，谁去给猫挂铃铛呢？没有一只老鼠敢去，一个个都溜掉了。老鼠会议豪无结果，它们不安全的境况当然也无法改善。
寓言所寄托的意思很明白：遇到困难的问题时候，既需要有出谋献策的人，更需要有挺身而出的实干家。
bell the cat常用来比喻to do sth dangerous in order to save others;to step forwar bravely to face the danger;to take a risk for the good of others.
eg:Everybody made suggestion,but no one actually offered to bell the cat.
We didn't know who would put him this delicate question when my friend offered to bell the cat.