Multiple constraint technologies typically are required to comprehensively declare the constraints, and to check information at run-time before it is dispatched to the actual service logic.

为了完整地声明约束，并且在将其指派给实际的服务逻辑之前检查信息，通常需要多种约束技术。

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Stanza 3: Defining a security constraint for a RESTful service

第三部分：为 REST 式服务定义一个安全约束

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The lack of skilled service providers in rural areas of India has emerged as the most important constraint in achieving universal health care.

印度农村地区缺乏专业卫生人员已经成为该国实现全民医疗最重要的制约因素。

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People who want to take advantage of this year's gift-tax exemption should beware of one giant constraint: The Internal Revenue Service will deny tax benefits to a trust if the person who sets it up retains control, either himself or through an agent.

WSJ: How to Control Your Heirs From the Grave

Under this hard budget constraint, the rest of the government would have to live on whatever revenues are left over after debt service and Social Security benefits are paid unless Congress is willing to vote for more new borrowing, by super-majority vote if it wants to increase the debt more than the economy is growing.

FORBES: In Passing The Most Recent Budget, Congress And The President Lied