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。

Externally, there is almost nothing to distinguish their passive house from the other buildings - except for the photovoltaic installation on the roof.

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被动LAN的有效性在安装后，必须保证很长的时间。

The efficiency of a passive LAN network still needs to be guaranteed long after it has been installed.

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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。

Instead of complex installation techniques, simple and passive solutions have been used to realise a good energy performance.

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