The basic problem is that many transmission lines, and the connections between them, are simply too small for the amount of power companies would like to squeeze through them.

根本的问题是，与电力公司希望输送的电量相比，许多输电线路和它们之间的连接线路的额定负荷能力太小了。

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A handful of states like California that have set aggressive goals for renewable energy are being forced to deal with the issue, since the goals cannot be met without additional power lines.

许多像加利福尼亚这样设定了雄心勃勃的再生能源目标的州都被迫正在解决这一问题，因为不建新的输电线路就不可能实现这些目标。

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Think in terms of a subway map, but add in layers of data like water and sewer lines, power grids, and real time traffic information.

例如，在地铁地图上增加其他一些数据，如供水和排水管道、电网和实时交通信息等。

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The report says up to one billion birds die each year from flying into objects like power lines, windows and tall buildings.

VOA: special.2009.05.12

When it comes to managing the risks from major storms you can do things like bury power lines.

FORBES: New York, Black Swans, Blackouts and Anti-Fragile Grids

The team is planning all sorts of other capabilities for the tech, including navigation systems -- "Power lines are like highways in the sky, " says one of the researchers -- and auxiliary surveillance systems that power up when jacked in.

ENGADGET: Air Force developing UAVs that can recharge on power lines

It's something that's fairly important in terms of allowing people access to back in there, just to - at least where you can have one lane cleared, you know, from fallen trees, live power lines, stuff like that, get those streets cleared and then move on from there.

NPR: Two Years Later, Joplin Mayor Reflects On Impact Of Tornado