main line

本線、幹線

main line の類語

trunk line, track, beat, l, direction, path, route, el, circuit, railway, metro, line of march, orbit, trade route, air lane, flight path, line, tram, branch, rail, tube, railroad, underground, terminal, feeder line, subway, trunk, streetcar line, line of flight, turnout, paper route, street railway, rail line, siding, feeder, light railroad, horse railway, electric railway, roadway, cable railway, itinerary, elevated railway, gravity-operated railway, rack railway, fairway, trolley line, monorail, trestle, elevated, junction, beeline, switchback, terminus, embankment, cog railway, rack-and-pinion railway, roadbed, sidetrack, crosscut, tramline

main line の言い換えを探すには

main line（本線）の類語・言い換え（パラフレーズ）を、日本語訳つきで関連度順に並べています。英作文の語彙を増やしたいとき、長文読解で本文と選択肢の言い換えを見抜きたいときに使えます。