美国经济学家在金融社团经济学领域做出了重要贡献。
American economists have made important contributions to the field of financial and corporate economics.
他在钢琴教学和钢琴演奏理论研究领域中，都做出了重要贡献。
He made important contribution in the realms of the piano pedagogy and theoretical research.
他在钢琴教学和钢琴演奏理论研究领域中，都做出了重要贡献。
He made important contribution in the realms of the piano pedagogy and theoretical research.
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