我為什麼放棄美國國籍？

楊振寧表示，我是1964年3月23日加入美國國籍的，當時做這個決定曾考慮了很久，是一個很痛苦的決定。1983年在一本書里我曾經說我父親到臨終時都沒原諒我。

Yang said that I was on March 23, 1964 to join the United States citizenship, did this decision had considered for a long time, is a very painful decision. In 1983 in a book I used to say that my father to end all didn t forgive me.

他說，2015年4月1日我放棄了美國國籍，這也不是一個簡單的決定。美國是一個美麗的國家，是一個給了我做科學研究非常好的機會的國家。我感激美國。而且，我知道很多美國朋友不會贊同我放棄美國國籍。

On April 1, 2015, he said, I give up U.S. citizenship, and this is not a simple decision. The United States is a beautiful country, gave me is a very good chance of country doing scientific research. I am grateful to the United States. And I know a lot of American friends don t agree with me to give up U.S. citizenship.