Bai Yuan: Assistant professor, advisor of postgraduates, now teaching in the Dep artment of Foreign Trade and Economics in Beijing Second Institute of Foreign La nguages(BSIFL).是什么意思_Bai Yuan: Assistant professor, advisor of postgraduates, now teaching in the Dep artment of Foreign Trade and Economics in Beijing Second Institute of Foreign La nguages(BSIFL).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句