绝望之下，城市开发者们开始在内华达山脉东边的欧文斯谷大肆抢购土地权和用水权。
Out of desperation, city engineers began buying up land and water rights in the Owens Valley, east of the Sierra Nevada.
注：上海昂立稚慧谷保留对以上数据的解释权。
Remark: Shanghai Only Education Group reserves the right to interpret all figures above.
论文利用公平电子现金的思想，在谷利则等人的盲代理签名方案的基础上提出了一个可撤销匿名、可回收代理签名权的代理签名方案。
This scheme meets the requirement of blind proxy signature, while the third party is easy to revoke a supposed signature and cancel the right of a supposed signer.
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