railroad

n.铁路

rag-bag, ragamuffin, rage, ragged, raggedly, raggedness, raging, raglan, ragout, rags, ragtag, ragtime, ragweed, ragwort, raid, raider, rail, railhead, railing, raillery, railway, railway-line, railwayman, raiment, rain, rain cats and dogs, rain forest, rain out, rain-check, rain-gauge, rain-swept, rain-water, rainbow, raincoat, raindrop, rainfall, rainforest, rainless, rainproof, rainy,