2009北京卷B篇:The jazz influence that George Gershwin and other musicians introuduced into their music is obviously American because it came from American musical traditions.麻烦请流利的翻译一下这句子,并划分句子成分。我平时做阅读,常看不懂句子,还看得很慢,学不会快读还知道意思,帮帮我,要高考了,我该怎么办?我的英语总是90多分上不去了!谢谢了!!