2005年之前，最常见的策略是义务农村服务契约和强制性农村服务作为进入研究生课程学习的优先条件。

Before 2005, the most common strategy was compulsory rural service bonds and mandatory rural service for preferential admission into post-graduate programmes.

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出于义务的或者是非强制执行的安排必须被禁止。

voluntary or non-enforceable arrangements should be barred.

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本协议构成卖方的合法、有效及具约束力的义务，可按其条款强制执行。

This Agreement constitutes a legal, valid and binding obligation of the Vendor enforceable in accordance with its terms.

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