While the formal rules can be changed overnight, the informal constraints are much more impervious to change and impose a powerful drag on abrupt change.

尽管正式规则能突然改变，而非正式约束却远不受变化的干扰，并能强有力的延缓突然的变化。

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The formal constraints and the informal constraints in induced institutional change are compatible. So this kind of institutional change has a fine economic effect.

诱致性制度变迁中的正式制度与非正式制度是相互兼容的，因而这种制度变迁具有很高的经济绩效。

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Engineering quality supervision institution is constituted by three factors: formal constraints, informal constraints and enforcement mechanism, which are some different in above three stages.

工程质量监督制度由正式约束、非正式约束和实施机制三要素构成，在不同的监督阶段这三要素包含的内容有所不同。

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What is exciting, beyond the music itself, is how it shows that hip-hop is in a period of transition in which formal constraints have dissolved almost entirely.

NEWYORKER: The Fame Monster

And for Scotland to be a formal part of such a sterling zone, the Bank of England and HM Treasury would wish to impose constraints on the financial risks that Scotland's banks could take - to limit liabilities for British taxpayers.

BBC: Could RBS stay in an independent Scotland?