専門性
http://matt.might.net/articles/phd-school-in-pictures/
https://gyazo.com/b9ad6a7273a186e92f51fc1d14e805f3
https://gyazo.com/0a4d94d59e2e91dbf697231352df76ad
https://gyazo.com/fe81b02cb9b96410fded25543c02ec51
https://gyazo.com/fce8bf3e7fcecd379c98c3a4b8dd3dd5