1. 摇滚乐
    Rock and roll is a kind of popular music developed in the 1950s which has a strong beat and is played on electrical instruments.

1. a genre of popular music originating in the 1950s
    a blend of black rhythm-and-blues with white country-and-western

    e.g. rock is a generic term for the range of styles that evolved out of rock'n'roll.

    Synonym: rock 'n' rollrock'n'rollrock-and-rollrockrock music