The unit personalities and intractability add a whole new depth to a game that may not be recognized on the surface, but for one reason or another keeps us coming back for more.

游戏单位的个性化设计和独特性给游戏增添了全新的深度，它也许不会被大家一眼所认出，但是却能够使我们回味无穷，让我们欲罢不能。

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Both of their security are based on the intractability of elliptic curve discrete logarithm problem.

两种方案的安全性都是基于椭圆曲线离散对数问题的难解性。

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The scheme is secure under the assumption of the intractability of logarithm problems and the random oracle model.

该方案在离散对数问题和随机预言模型假设下是安全的。

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Given the messy intractability of state failure, who or what has a chance of solving it?

ECONOMIST: Failed states

Paul Theroux, a hard-to-please American travel writer, experienced French intractability at first hand on the Orient Express.

ECONOMIST: For some, France is still on the other side of the earth

The young director, Joe Carnahan, wants to impress upon us the intractability of our life on this earth.

NEWYORKER: Narc