Even if you did not add new apps to your phone, an app update alone can use lots of battery power.

即使你没有给手机添加新的应用程序，单是应用程序更新就会消耗大量的电池电量。

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What kind of battery will we use to power our car?

我们会使用什么样的电池作为汽车的动力？

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But even with this advantage, wireless devices offer a vast range of capabilities in terms of memory, processing power, battery life, display size, and network bandwidth.

但即使有这个优点，各种无线设备在内存、处理能力、电池寿命、显示屏大小和网络带宽等方面的能力差异还是相当大的。

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Imagine how much power it takes to drive an artificial heart, so you've got to have a battery or some way of generating power continuously to operate that and that makes it difficult to think about implantable and so that's a really good example of Biomedical Engineering.

驱动人工心脏所需要的能量是难以想像的,所以需要电池或者是某种持续发电装置,来给人工心脏提供能量,这就增加了人工心脏的植入难度,这是很好的生物医学工程的例子

耶鲁公开课 - 生物医学工程探索课程节选

The Dreamliner relies on electricity to power more functions than previous Boeing airliners, and that takes a lot of battery power.

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In 10 hours of daylight charging the unit gathers up to 20 hours worth of battery power for use in the low-power 8 LED mode, or 10 hours of life if used in 16 LED mode.

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The top of the stack is battery power, and the bottom of the stack is gasoline power.

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