创建一个你可以不被轻易抓住的环境，或者如果你有系统拥有者方面的许可，你才能侵入他的机器。

Create a situation in which you cannot be caught that easily or if you have permission from system's owner side that, his machine can get hacked by you.

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公路网的支持者通常会反对拥有良好公共交通的城市模式，他们认为这样的系统在他们所在的城市行不通。

It is common for supporters of road networks to reject the models of cities with good public transport by arguing that such systems would not work in their particular city.

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入侵者入侵您的系统可能是出于这两个原因之一：为了获取他们本不应该拥有的信息，或者为了改变系统的行为。

Intruders might invade your systems for one of two reasons: to gain access to information that they should not have or to alter the behavior of a system.

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