Network security is a system concept, effective security strategy or program development, is the primary objective of network information security.

网络安全是一个系统的概念，有效的安全策略或方案的制定，是网络信息安全的首要目标。

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Then elaborate the primary coverage of Winckelmann's concept of art history in detail.

然后，详细论述温克尔曼艺术史观的主要内容。

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Then elaborate the primary coverage of Winckelmann's concept of art history in detail.

然后，详细论述温克尔曼艺术史观的主要内容。

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