Even children as young as 5 or 6 worked in mines, mills, and factories.
甚至 5、6 岁的儿童也在矿山、磨坊和工厂工作。
美国历史
It urged them to unite against the capitalists, to get possession of the machinery of government, and to introduce collective or public ownership of railways, land, mines, mills, and other means of production.