He is also a faculty research fellow at the National Bureau of Economic research.
此外，他但是国民经济研究局的一名研究员。
In 1998, he was appointed a Research Fellow at the National Institute of Science Education.
1998年，他被任命为在全国教育科学研究所研究员。
In 1998, he was appointed a Research Fellow at the National Institute of Science Education.
1998年，他被任命为在全国教育科学研究所研究员。
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