Therefore, it is imperative to construct digital library in China.

因此，尽快地建设中国数字图书馆势在必行。

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Currently it's imperative to construct and perfect rural medical security system.

建立和完善农村医疗保障体系势在必行。

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Currently it's imperative to construct and perfect rural medical security system.

建立和完善农村医疗保障体系势在必行。

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