Rock music is a genre of music that originated in the United States in the late1940s.

Rock and roll is a kind of music, which originated in the United States in the late 1940s. )

It became popular in the early 1950' s and quickly spread all over the world.

(It became popular in the early 1950s and quickly swept the world. )

Rock and roll expresses emotion with its flexible and bold expression and passionate music rhythm.

Rock music expresses emotions with its flexible and bold expression and passionate music rhythm. )

It was welcomed by most people in the world and became a craze in the1960s and1970s.

(loved by most people all over the world, it became a craze in 1960 and 1970. )

2. Pop music

Pop music is translated from English pop music.

Pop music is translated from English pop music. )

The accurate concept of pop music should be commercial music, which refers to music creation with the main purpose of making profits.

The accurate concept of pop music should be commercial music, which refers to music created for profit. )

It is a commercial music pastime and all the "industrial" phenomena related to it.

It is a commercial music entertainment and all the "industrial" phenomena related to it. )

3. Folk songs

Popular folk songs with national colors are called folk songs or ballads.

Popular folk songs endowed with national colors are called folk songs or ballads. )

Folk music has a long history, so the author is unknown.

Folk songs have a long history, so most of their authors are unknown. )

4. Heavy metals

Music, a heavy metal, was originally considered by some people as the evolution of "hard rock".

Heavy metal music was originally considered as "hard rock" by some people. )

In fact, hard rock and heavy metal are usually not easy to distinguish, and different people have different ways to distinguish them.

In fact, hard rock and heavy metal are usually not easy to distinguish, and different people have different ways to distinguish them. )

Some people think that it was called hard rock before the 1970s and heavy metal after the 1970s.

Some people think that it was called hard rock before the 1970s and heavy metal after the 1970s. )

And most people think that they are not a species from a historical perspective.

(and most people think that from a historical point of view, they don't belong to the same category. )

5. Classical music

Classical BBB 0 is divided into broad sense and narrow sense.

Classical music can be divided into broad sense and narrow sense. )

Broadly speaking, it refers to those from the Middle Ages to the present.

(broadly speaking, it refers to people from the Middle Ages to the present. )

Western classical works created under the background of European mainstream culture.

Western classical music created under the background of European mainstream culture. )

It is different from pop music and folk music, mainly because of its complex and changeable creative techniques and the heavy connotation it can carry.

It is different from pop music and folk music mainly because of its complex and diverse creative techniques and heavy connotation. )

Baidu encyclopedia-classical music

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