States lay down rules about how many children each employee is allowed to watch over, the space care centers need per child and other minute details.

各州规定了每个雇员可以照看多少个孩子，每个孩子在看护中心需要多大空间，以及其他细节。

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The students, mostly from one-child families, were taught to be a good child under strict rules.

这些学生大多来自独生子女家庭，他们在严格的规矩教导下成为一个好孩子。

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But researchers say bedtime rules may improve a child's development.

VOA: special.2010.06.09

The most upsetting thing about many child-protection rules is they assume any adult is capable of doing something bad.

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Child-support rules also discourage poorly skilled men from working.

ECONOMIST: America's jobless men: Decline of the working man | The

They want to export America's rules that protect workers against exploitation in various forms, including rules forbidding child labour.

ECONOMIST: The real losers