Concept of limit displacements of primary support system of railway tunnel are presented, and the method for determining the limit displacements is introduced systematically.

阐述了隧道支护系统极限位移的意义，系统地介绍了初期支护极限位移的确定方法。

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Most switches that support a VIP can also support a policy of primary system or secondary system, so that traffic goes to the primary system unless it is unavailable or fails the validation.

大部分支持VIP的交换机也能支持主用系统或备用系统的策略，以便流量跑到主用系统那里，除非它不可用或验证失败。

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System configurations support failover and disaster recovery, as primary and backup systems may be separated by many miles.

系统配置支持故障转移和灾难恢复，而主系统和备份系统可以放置在距离很远的两个位置。

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In return for supporting tax increases Mr Maldonado wants support for a ballot initiative that would reform the primary system, making it more hospitable to people like him (ah, to hold the deciding vote at such a time).

ECONOMIST: California's crisis

In regard to education, the Director-General underlined the importance of responding to the need to support the education system expressed by the country, especially in terms of post-primary and higher education and the need to strengthen enrollment of girls at these levels.

UNESCO: The Director-General meets H.E. Blaise Compaor��, President of the Republic of Burkina Faso | United Nations Educational, Scientific and Cultural Organization