The research on the entry and exit barriers is an important part of industrial economics.

进入与退出壁垒的研究是产业经济学的重要组成部分。

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We examine an aggregate index of the business environment that incorporates information on entry and exit barriers, effective property rights protection, and sound contract enforcement.

我们分析一个商业环境总指数，该指数包括有关于进入和退出的各种障碍、切实有效的保护私人财产权利和健全的执行契约的信息。

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Built with safety in mind, the highways have wide lanes and shoulders, dividing medians, or barriers, long entry and exit lanes, curves engineered for safe turns, and limited access.

出于对安全因素的考虑，公路有宽阔的车道和路肩、中央分隔带、界限、长长的出入口车道、为安全转弯而设计的弯道，以及限定数量的入口。

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To keep our leaders honest we need to constantly challenge that power, work to break entrenched power cliques, and demolish barriers to entry and exit in our political system.

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