Nearly one out of three births in America is to an unwed mother .

在美国，几乎每三个新生儿当中就有一个 系 未婚 妈妈所生。

Joan felt she could never live down the fact that she was an unwed mother .

琼觉得它无法使 别人忘记她是个 未婚 妈妈的事实。