railbed
noun
A bed of gravel, broken stone, etc., upon which the rails are laid for a railway.
Origin
Late 19th century; earliest use found in ‘Mark Twain’ (1835–1910), author and lecturer (real name Samuel Langhorne Clemens).
| 单词 | railbed |
| 释义 | railbednoun A bed of gravel, broken stone, etc., upon which the rails are laid for a railway. Origin |
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