This part is the present paper center link.

这个部分是本论文的中心环节。

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The classroom teaching is the basic form of mathematics teaching, it is the center link of teaching work.

课堂教学是数学教学的基本形式，它是教学工作的中心环节。

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For more information about merge scan joins, refer to the appropriate information center link in the Resources section for your DB2 platform.

要了解有关合并扫描联接的更多信息，请参考参考资料部分中针对您的DB 2平台的适当的信息中心链接。

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The Help Center link urges people to contact the National Suicide Prevention Lifeline and is a literally life-saving option.

FORBES: Suicide Prevention Comes to Facebook: A Life-Saving Option With A Dark Side

Researchers at the Columbia University Medical Center identified a link between the condition, often diagnosed during late teens and twenties, and experiences in the womb.

BBC: Flu in pregnancy 'may raise bipolar risk for baby'

It turned out the data source was in the same data center and the firm could link to it by LAN with 24 to 48 hours rather than installing a circuit that might take 4 to 8 weeks.

FORBES: New Equinix Marketplace Can Link Financial Firms and Digital News