美国国家冰雪数据中心（NSIDC）位于科罗拉多州，其主任马克·塞雷泽（Mark Serreze）认为，随着我们进入21世纪，海平面上升将成为一个越来越大的问题。

Mark Serreze, director of the American National Snow and Ice Data Center (NSIDC) in Colorado, thinks that sea level rise is going to be a bigger and bigger problem, as we move through the 21st century.

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这只蚱蜢由弗朗索瓦泽维尔拉兰内在巴黎制作，20世纪60年代以来他和妻子克劳德合作展出拉兰内艺术品。

The grasshopper was made in Paris by François-Xavier Lalanne, who, since the 1960s, had exhibited with his wife, Claude, as the Lalannes.

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基于椭圆曲线离散对数问题，纪家慧和李大兴提出了一个代理签名方案和一个代理多签名方案，陈泽雄等人给出了另外两个代理多签名方案。

Based on the elliptic curve discrete logarithm problem, Ji and Li proposed a proxy signature scheme and a proxy multi-signature scheme and Chen et al. proposed two proxy multi-signature schemes.

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