As an additional safeguard against weeds you can always use an underlay of heavy duty polyethylene.
作为另外一种预防杂草的防护措施，你可以一直使用一层厚重耐磨的聚乙烯底垫。
As an additional safeguard, it is recommended that approved, released packages are digitally signed by the appropriate parties, and that all packages are verified before deployment.
我们建议由恰当的人员对已批准和已发布的包进行数字化签名，这样所有的包在部署前都通过验证，为部署安全提供更进一步保障。
As an additional safeguard, it is recommended that approved, released packages are digitally signed by the appropriate parties, and that all packages are verified before deployment.
我们建议由恰当的人员对已批准和已发布的包进行数字化签名，这样所有的包在部署前都通过验证，为部署安全提供更进一步保障。
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