由于能源负载大大降低，一系列太阳能电池板将使它们能够实现纯零能耗。

Because the energy load is so greatly reduced, a series of solar panel arrays will allow them to realize net-zero energy consumption.

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作为太阳能电池基础材料的纯硅，是昂贵的，因而这诱使其使用减少。

Purified silicon, the basic material of such cells, is expensive. The temptation, therefore, is to use less of it.

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美国的公司和工人在太阳能价值链上，特别是在最终用于太阳能板上的超纯硅的生产上仍然是有优势的。

U.S. firms and workers still dominate the most lucrative parts of the solar value chain, particularly the production of the ultrapure silicon that ultimately goes into solar panels.

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