Externally, there is almost nothing to distinguish their passive house from the other buildings - except for the photovoltaic installation on the roof.
从外部看，该被动式住宅与其它的住宅，几乎没有什么区别——要不是有光伏太阳能发电系统安装在屋顶上。
These parameters are very useful in the design, installation and estimation of capability for microwave passive radio relays.
这些参数对微波无源接力站的设计、安装以及性能估计是很有用的。
Instead of complex installation techniques, simple and passive solutions have been used to realise a good energy performance.
取代复杂的安装技术，简单、被动的解决方法已经用来实现良好的能源性能。
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