EU Referendum, on whether to stay in the European Union or to quit. 歐盟公投, 是否留在歐盟或退出

EU Referendum Deal Britain's 'Last Chance,' European Leaders Tell David Cameron
http://www.huffingtonpost.co.uk/2016/02/19/eu-referendum-deal-britains-last-chance-european-leaders-tell-david-cameron_n_9271084.html
Cameron appeals to Boris Johnson not to join Brexit camp | Politics | The Guardian
http://www.theguardian.com/politics/2016/feb/21/cameron-boris-johnson-brexit-nigel-farage-george-galloway-uk
Divided Britain to Decide on Whether to Leave the E.U. - 纽约时报中文网 国际纵览
http://cn.nytimes.com/world/20160221/c21britain/en-us/