电力公司资助的电力资源研究院正在想办法保护美国电网免遭雷击。

EPRI, which is funded by power companies, is looking at ways to protect the United States' power grid from lightning strikes.

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Google的数据中心借鉴美国电网的教训——美国电网50%的能源依赖煤炭。

Google's data centers draw from a U.S. electricity grid that relies on coal for 50% of its power.

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2009年，新闻报道称美国电网的控制系统被黑，且侵入者建立了秘密入口以便随时返回。

In 2009, this newspaper reported that the control systems for the U.S. electric power grid had been hacked and secret openings created so that the attacker could get back in with ease.

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