After breaking up have been hoping for the day when you can go back and I now, the old trophy, renewable front.
分手后一直企盼着有一天你能把我接回去，重温旧梦，再续前缘。
Almost by definition, renewable energy sources have low running costs but high up-front costs.
很明显，可再生能源的运营成本很低，但是前期投入很高。
Almost by definition, renewable energy sources have low running costs but high up-front costs.
很明显，可再生能源的运营成本很低，但是前期投入很高。
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