The cheapest way to increase capacity is to add more spectrum or to move a network to a lower frequency, which allows radio waves to penetrate walls more easily.

提高带宽容量最便宜的方法是增加更多频谱或是某个网络降低到更低的频率以使无线电波更容易穿透墙壁。

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Instead of trying to penetrate a network and find a domain or network they're completely unaware of, the hacker only has to infiltrate a portion of a network that they do know about.

他们不必再去尝试潜入网络并找到毫不了解的域或网络，只需进入自己了解的某个网络的一部分即可。

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The rot produces methane, which is collected via a network of pipes that penetrate the mountain, and burned to produce electricity.

ECONOMIST: A history of waste

In a talk at the Black Hat security conference in Barcelona Thursday, Greek researcher Thanassis Giannetsos plans to present a new software tool that he and two colleagues have written that they say would allow a malicious hacker to penetrate a sensor network and change or delete data at will.

FORBES: Researcher Throws A Wrench In IBM And HP's Sensor Networks

This technique tries to trick people into revealing useful information that attackers can capitalise on to penetrate deeper into a network.

BBC: State-backed data spies hunt industrial secrets