该报告是中国国家税务总局和美国加州大学伯克利分校专家联合发布的。
The report was jointly produced by experts from China's State Administration of Taxation and the University of California, Berkeley.
美国加州大学伯克利分校能源和资源教授丹尼尔·卡门对此表示赞同：斯皮纳克面临的最严峻挑战是该计划实施的成本。
Daniel Kammen, a professor in energy and resources at the University of California, Berkeley, agreed: the most daunting challenge to Spirnak is cost.
加州大学伯克利分校 美国
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