He received a doctorate in economics at the university of pennsylvania in the early nineteen seventies .
二十世纪七十年代初期,他获得宾夕法尼亚大学经济学博士学。
In the seventies , the completion of new york 's famous one and two world trade centers and the sears towers in chicago heralded the global economic crises of 1974 .
In the early seventies , interferon , a drug that had been developed from a protein released by white blood cells during a viral infection , was widely thought to be a possible cure for cancer ; in 1980 , it appeared on the cover oftime .
She is in her seventies with curly white hair and a sweet grandmotherly smile .
她已经七十多岁了,一头卷卷的白发,带着亲切慈祥的微笑。
A quarter of a century later , now in her seventies herself , this child of the taiga lives on alone , high above the abakan .
四分之一个世纪后,她已然七十多岁,这个针叶林的孩子继续独自生活,在阿巴坎河流域高高的山上。
I 'm having trouble deciding whether I understand the world better now that I 'm in my seventies than I did when I was younger , or whether I 'm becoming more and more clueless every day .
我难以判定,究竟是现在这个七十多岁的我比年轻时更了解世界,还是我对世事一天天地更加没有头绪。
Japan has made nuclear energy a national priority since the nineteen seventies .