Transactions perform the role in enterprise applications that contract law plays in society — they specify how commitments are unwound if one party fails to live up to their part of the contract.

事务在企业应用程序中所起的作用与合同法在社会上所起的作用一样——它们规定，如果一方不能履行他那一部分合同，则交易将失效。

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Given the pivotal role of randomization in some matrix-based simulations, it is instructive to investigate how these libraries perform in situations that call on randomization.

考虑到随机化在某些基于矩阵的模拟中的关键作用，研究这些库在调用随机化的情况下的表现是有益的。

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Database security administrator (DBSECADM) is a new built-in role introduced to perform all security-related administration, including setup of the LBAC security infrastructure.

数据库安全管理员(DBSECADM)是一个新的内置角色，用于执行所有与安全相关的管理，包括LBAC安全基础设施的设置。

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Invited back the following year to perform the role of the heroine Violetta in Verdi's "La Traviata, " she met Ms. Clayton, who was playing Violetta's best friend, Flora, in the production.

WSJ: A Diva's Desert Hideaway

Things like marketing and release schedules play a role in determining how well a movie will perform but at the end of the day, what really matters is how good the movie is.

FORBES: Can 'Megamind' Continue DreamWorks' Run of Mega-Hits?

This will lead to more Parliamentary debate on security matters, public hearings on the national security strategy, and - as promised - greater transparency over appointments to the Committee so that the Committee can not only review intelligence and security but also perform a public role - more akin to the practice of Select Committees - in reporting to and informing the country on security matters.

BBC: In full: Brown security statement