• And Africa,where approximately depends on rainfall, is particularly vulnerable, Climate change can be reversed, in part,he says, through reforestation programs, better land management and the rehabilitation of degraded crop and pasture land.

    VOA: standard.2010.03.29

  • You rotate the letters by a deterministic amount, by a fixed number of steps so that the end result is actually something that can be reversed.

    你用确定的数量旋转那些字母,通过一个固定数量的步骤,这样,最终结果是可以把它,反加密出来。

    哈佛公开课 - 计算机科学课程节选

  • You rotate the letters by a deterministic amount, by a fixed number of steps so that the end result is actually something that can be reversed.

    你用确定的数量旋转那些字母,通过一个固定数量的步骤,这样,最终结果是可以把它,反加密出来。

    哈佛公开课 - 计算机科学课程节选

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