English @ the Movies: 'So Long'

source: VOA Learning English      2016年8月13日
Our English @ the Movies phrase is from the movie "The Secret Life of Pets." This is a funny cartoon movie about pets and what they do when their owners leave. The phrase is "so long." Does this have anything to do with measuring? Listen and find out.
Originally published at - http://learningenglish.voanews.com/a/...