Before entering the elective system need to authenticate that user login authentication.

进入选课系统之前需进行身份验证，即实现用户登录认证。

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The president of Harvard pioneered the elective system, by which students were able to choose their own courses of study.

哈佛大学的校长率先推出选课制度，这样学生们就能选择自己的专业。主修领域的概念也出现了。

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The credit system which comes from the elective system has been widely adopted as an essential practice in reforming the teaching management in colleges in the world.

学分制肇始于选课制，是许多国家高校普遍实行的一种教学管理制度。

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Mr Edwards has also been encouraged from what seems like a smooth start to payment by results - from 2003 some hospitals have been operating under the system for elective care as pilots.

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The harsh truth about early elective deliveries is that our payment system encourages them.

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The new payments system was used in 2004-05 for both elective and emergency admissions to foundation hospitals, a select group that have won more freedom to run their affairs.

ECONOMIST: National Health Service