家庭的复数英文怎么写

　　例句：

　　Many families are living below the level of subsistence.

　　许多家庭难以度日。

　　Some families go without medical treatment because of their inability to pay.

　　有些家庭因无力支付医疗费用而得不到医治。

　　We provide help to families in crisis situations.

　　我们对处于困境的家庭提供帮助。