在最近18个月里，拥有社交网络个人档案的百分比率从39%上涨到了56%。

In the last 18 months, the percentage of Canucks with a social networking profile has increased from 39% to 56%.

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如果很少使用网络，那么这个比率就会很低。

With low usage, the ratio will be low.

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Geambasu 博士与她的同事们意识到：由于电脑的登录与退出数保持在一个相当稳定的比率，因此他们能够利用这些网络作为临时存储密钥的场所。

colleagues realised that because computers logged on and off P2Ps at a fairly steady rate, they could use these networks as places to store encryption keys temporarily.

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