介绍:
正确原文：
Ok, so in our last class we were discussing big bands swing music. You remember, this was a kind of dance music with a steady rhythm. But today we deal with that sort of music played by smaller jazz bands. It's called bebop. Now bebop makes use all sorts of new types of rhythms, some of them very irregular. We will talk more about that later. But first I wanna talk about some of the social elements that I believe contributed to the development of bebop music. To do this, we have to look at when bebop arose and started becoming so popular which was from the late 1930s through the 1940s from the time of the Great Depression right into the 2nd World War. Now one factor that certainly helped create the environment for bebop music was the decline of the United States economy. During the Great Depression, the economy suffered tremendously, and fewer people had money to spend on entertainment. Then during the 2nd World War, the government imposed a new tax on public entertainment, what you might call performance tax. The government collected money on performances that included any types of acting, dancing or singing, but not instrumental music. So to avoid this new tax, some jazz bands stop using singers altogether. They started relying on the creativity of the instrumentalist to attract audiences. This was what bebop bands did. Now remember a lot of big bands had singers. So the instrumentalists simply played in the background and had occasional solos while the singers sang the melody to the songs, but not bebop bands. So the instrumentalists had much more freedom to be creative. So they experimented playing the music faster and using new irregular sorts of rhythms.
生词摘录：
1.swing music: 摇摆舞音乐
2.rhythm: n. 节奏
3.bebop: n. 爵士音乐的一种
4.irregular: adj. 不规则的，无规律的
5.arose: arise的过去式，引发，激起，唤起
6.Great Depression: 大萧条
7.the 2nd World War: 第二次世界大战
8.decline: n. 下降，衰退
9.entertainment: n. 娱乐
10.impose: v. 征税，强加
11.performance tax: 演出税
12.instrumental music: 器乐
13.creativity: n. 创造力
14.instrumentalist: n. 乐器演奏家
15.solo: n. 独奏曲
16.melody: n. 适于歌唱的诗
17.experiment: v. 进行实验，试验
