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太阳能电池板已经便宜到足以成为绿色能源的主要组成部分了。美国已经对光伏研究扶持了近40年,最近还有30%的投资税减免。
Solar panels have become cheap enough to be a major part of green energy. The United States has supported PV research for nearly 40 years and recently has a 30% tax reduction on investment taxes.