Wooden fence rails are usually not suitable for tying; a pulling horse could easily detach them and panic when the rail hits him or chases after him.

木制篱笆的围栏通常不适合拴马，一匹使劲拉拽的马能够很轻松的拉开它们而且当围栏打到他们或是跟在他们后面的时候会使他们受惊。

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Something, such as the top rail of a fence, that rests on or is supported by something else.

依靠或被别的物体支撑的物体，如篱笆上部的横梁现代英汉词典。

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Instead, use a post and rail fence or woven wire horse fencing.

相反，使用邮政和铁路栅栏或编织线马剑击等。

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Johnson Library, a midcentury futuristic cube at the University of Texas at Austin, the imperial and the folksy are at odds: Sweeping travertine stairs and a monumental display of scarlet storage boxes emblazoned with gold presidential seals contrast with an animatronic, Stetson-wearing Johnson posed at a split-rail fence.

WSJ: Bricks and Immortality | George W. Bush Presidential Center | By Julie V. Iovine