They're not the largest number of people, but they are some of the most expensive -- and in terms of the likelihood for domestic abuse, drug and alcohol abuse, poor performance by their kids in schools and also poor health as a result of stress.
他们并不是最庞大的群体， 但却是开销最大的群体之一。 他们是家庭暴力，吸毒酗酒的高危人群， 他们的子女在学校普遍不如其他家庭的孩子， 由于承受巨大压力，他们的身体健康非常差。