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为了降低冬季运行费用,有必要寻找廉价的外碳源。
It is necessary to look for low-cost external carbon sources for reducing the operating cost in winter.
youdao
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为了降低冬季运行费用,有必要寻找廉价的外碳源。
It is necessary to look for low-cost external carbon sources for reducing the operating cost in winter.
youdao