哈佛校长是谁 哈佛校长清华演讲稿全文
Party Secretary Chen Xu, Assistant President Shi Yigong,distinguished faculty, students and friends. Itis a privilege to be back at Tsinghua, with an opportunity toexchange ideas on the most pressing challenges of ourtime. One challenge that will shape this centurymore than any other is our changing climate, and the effort tosecure a sustainable and habitable world—as rising sea levelsthreaten coastlines, increasing drought alters ecosystems andglobal carbon emissions continue to rise.