A small group of people from the Sefwi tribe in western Ghana converted to Judaism in the 1970's.

VOA: standard.2009.09.26

And who, where would--If it was, if it was converted into a weapon, where would the vaccines to protect the rest of the country come from?

如果天花被转化成生化武器,去哪里才能找来保护国家的疫苗呢

耶鲁公开课 - 生物医学工程探索课程节选

Now,Khan records his lessons from a converted closet in the back of his bedroom.

VOA: standard.2010.03.26