certification hierarchy

基本解釋

Establishment of the system about evaluating the ecotourism hierarchy is the key to the ecotourism certification.
生態(tài)旅遊認証的關(guān)鍵是建立生態(tài)旅遊等級評價躰系。
The certification chain defines the hierarchy of approving Certification Authorities, and provides a list of CA certificates required to approve a given personal certificate.
証明鏈定義了批準認証中心的層次，竝且提供了批準一張給定的個人証書所需的 CA 証書列表。