并且还有两块太阳能电池板（一块在屋顶，另一块在后院）这两块电池板在有阳光的时候贮存电能，并通过两个不同的系统来提供照明用电和热水。
There are two photovoltaic arrays (one on the roof, another in the backyard) that produce electricity on sunny days, and a separate system that provides solar hot water.
（和电池相比，）这是一种“低能量密度”设备，电能被直接存储在两块静止的导电板上。
This is a low energy-density device, which stores electricity directly by charging two conductive plates with static.
BloomEnergy制造的这种小型的燃料电池盒名叫“BloomBox”，只需两块即可为一个美国家庭供电(乡村地区用电较少的家庭，则仅需一块)。
Bloom Energy are producing tiny fuel cell boxes they call "Bloom boxes." Two of these can apparently power a U.S. home (and only one for homes in countries that use less power).
这盏灯是由两块小电池供电的。
这款设计入围了富士通2011年设计大赛，通过两块太阳能电池板，在白天为笔记本提供持续不断的电力。
The design, which has been shortlisted in Fujitsu's 2011 design competition, calls for two solar panels that are able to provide a continuous charge throughout the day.
另外，乘客随身的行李里只允许携带两块备用的可充电的锂电池。
Additionally, only two spare rechargeable lithium batteries will be allowed on airplanes per passenger in carry-on bags.
而在新系统中，这些细菌可以通过洋葱汁产生甲饶，然后这些气体通过两块300千瓦的燃料电池，其产生的电量足够460户居民的日常用电。
In the new system, bacteria produce methane5 gas from the juice. The gas then goes to two 300 kilowatt fuel cells, creating enough power for 460 homes.
而在新系统中，这些细菌可以通过洋葱汁产生甲饶，然后这些气体通过两块300千瓦的燃料电池，其产生的电量足够460户居民的日常用电。
In the new system, bacteria produce methane5 gas from the juice. The gas then goes to two 300 kilowatt fuel cells, creating enough power for 460 homes.
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