In the late 1970’s , nearly a third of all blacks still belonged to the underclass Americans so that they are poor, underprivileged and unable to seize the opportunity of advancement.
In the late 1970’s , nearly a third of all blacks still belonged to the underclass Americans so that they are poor, underprivileged and unable to seize the opportunity of advancement.
20世纪70年代末期，几乎有三分之一的黑人属于下层阶级的美国人，穷困潦倒，没有地位，无法获得发展机会。