很多人对光电池单元，又叫太阳电池板，并不陌生，在宇宙飞船、屋顶以及计算器上都可以见到它的踪影。
Many people are familiar with so-called photovoltaic cells, or solar panels, found on things like spacecraft, rooftops, and handheld calculators.
传统的太阳电池板必须倾斜放置并得小心摆放，以免遮蔽邻近的电池板，管状的面板能平躺得铺满整个屋顶。
And whereas traditional solar panels have to be tilted and carefully positioned so as not to shade nearby panels, tubular ones can be laid flat over the entire roof.
别墅的屋顶最终支持太阳电池板。
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