Many of the uncounted were so-called "black children", ie, those born in breach of regulations that limit urban couples to a single child.

许多那些未被统计的儿童被称为所谓的“黑孩”，这些孩子的出生违反了相关规定，该规定是限制城市夫妇只生一孩。

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The Urban Institute estimates that children make up 25 percent of the nation's homeless population, but most are living with a single mother, not the father.

根据城市协会估算，全国无家可归的人口中儿童占到百分之二十五。但是，绝大多数儿童和单亲母亲而不是单亲父亲一起生活。

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In urban China, where families are allowed but one offspring, single children are often spoiled.

在中国城市，每个家庭只被允许有一个后代，独生子女往往都被宠坏了。

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China's family planning laws limit most urban couples to a single child, while rural families are allowed to have two children if their first born is a girl.

BBC: China director Zhang 'investigated' over one-child rule