The underclass consists of the poor, the homeless, many of the unemployed, the emotionally disturbed, and the disabled.

该下层阶级包括穷人、无可归、众多失业、情感受残疾人。

That drives poverty and you have almost a permanent underclass.

这导致了贫困，而且你几乎会永远处于下层阶级。

In 1928, he had maybe his greatest success with " The Threepenny Opera, " a tale of the criminal underclass, co-written with the composer Kurt Weill.

他在1928年与作曲库尔特·威尔合著的《三便士歌剧》或许是他最为功的作品。

Bestselling books predicted dystopian outcomes in which society split into a wealthy, robot-owning plutocracy and an unemployed underclass, and repressive governments would be needed to rein in social discontent.

畅销书也预测了反乌托邦式结果，社会将会一个富有的，拥有机器人的富豪统治阶层一个失业的底层社会，还需要专制政府来控制社会不满情绪。但是在2030年的。

If 21st-century economies are not to create a massive underclass, policymakers urgently need to work out how to help all their citizens learn while they earn.

如果21世纪的经济体不想要产生一个庞大的底层阶级，政策制定亟需制定措施，帮助国民在谋生的同时学习。