本领域内需要一种改进的用于管理可更换的存储介质（例如盒式带）的到期和活动加密密钥的技术。

There is a need in the art for improved techniques for managing expired and active encryption keys for removable storage media, such as tape cartridges.

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散耗型模型考虑了水在不同介质和不同形态之间的交换或转化，并重点考虑人类活动如引水灌溉、地下水的开采等对水平衡的影响。

The water movement and exchange in deferent media and phases are investigated, and the influences of human activities such as irrigation, exploiting groundwater are also taken into consideration.

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通过松弛数判断壳幔介质的变形属性，给出印缅板块强震活动趋势的动力学解释。

The distortional character of crust and mantle medium is judged by relaxation number, the dynamic reason is given to interpreting the strong earthquake activity te.

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