dead horse

常见例句

The horse did what the fox asked, and then the fox went to the lion, who had his den not far off, and said, "A dead horse is lying out there.
狐狸跑到狮子住的洞口边，对狮子说：“狮子大王，有条小路上躺着一匹死马，我们一同去，你可以作一顿很不错的午餐来享受哩。”
The man who feeds his horse on Monday and gives him nothing to eat on Tuesday will have a weak horse on Wednesday, a half-dead horse on Thursday, and a dead horse on Friday.
某一个人，在星期一喂养了他的马，而星期二什么也没给马吃。那么，到了星期三，这匹马就虚弱了；到了星期四，就半死不活了；到了星期五，它就丧命了。
Dead horse on battlefield, Gettysburg, Pennsylvania photographed 1863. Civil War Photograph Collection Library of Congress Prints and Photographs Division.
一匹马的尸体躺在战场上，1863年拍摄于宾夕法尼亚州葛底斯堡。

We say this is like beating a dead horse.
Even there, a horse is not really a rigid body, unless it's been dead for a long time.
马甚至都不是真正的刚体,除非是死了很长时间了
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