railbed

发音

/ˈɹeɪlbɛd/

词形变化

railbeds 复数 railbeds

别名

rail bed

释义与例句

n.
  1. 1.

    The substructure of a railway, underlying the tracks; the roadbed of a railroad.

    Holonyms: permanent way, right of way

词源

From rail + bed.

来源：wiktionary