请问谁能用英文帮我介绍一下R&B?

Rhythm and Blues 蓝调音乐/说唱
R&B has its origin in American blacks,it express some kind of sorrow emotions .
R&B was developed on the basis of western African music,and it was spreaded among the black slaves,then gradually become a popular melody.
R&B has influenced American mordern popular songs to a great extent.
说唱是在蓝调基础上发展形成的.