roll-on roll-off
adjective🔊/rəʊl ˌɒn rəʊl ˈɒf/
🔊/rəʊl ˌɑːn rəʊl ˈɔːf/
[usually before noun] (abbreviation ro-ro)
(British English)(of a ship 轮船 designed so that cars can be driven straight on and off 滚装的；汽车可直接上下的 a roll-on roll-off car ferry 汽车可直接上下的渡船