The study of the means of evaluating state science and technology secret is an urgent subject now.

国家科技秘密密级评价的方法是当前需要解决的一个重要课题。

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The study of the means of evaluating state science and technology secret is an urgent subject now.

国家科技秘密密级评价的方法是当前需要解决的一个重要课题。

youdao