優さんの話は面白いし、分かりやすい!
その1
http://www.youtube.com/watch?v=Dr25Lwyksk4&feature=related
その2
http://www.youtube.com/watch?v=NC4Vme2N3Xk&feature=related
その3
http://www.youtube.com/watch?v=Q8T6kyhgC1w&feature=related
その4
http://www.youtube.com/watch?v=qiMufwp22pw&feature=related
その5
http://www.youtube.com/watch?v=b4TnQY6nvyY&feature=related
その6
http://www.youtube.com/watch?v=lA6IjPqMqyA&feature=related
その7
http://www.youtube.com/watch?v=1b6s9xdeQHg&feature=related
その8
http://www.youtube.com/watch?v=t6ZbI54pxBc&feature=related
その1
http://www.youtube.com/watch?v=Dr25Lwyksk4&feature=related
その2
http://www.youtube.com/watch?v=NC4Vme2N3Xk&feature=related
その3
http://www.youtube.com/watch?v=Q8T6kyhgC1w&feature=related
その4
http://www.youtube.com/watch?v=qiMufwp22pw&feature=related
その5
http://www.youtube.com/watch?v=b4TnQY6nvyY&feature=related
その6
http://www.youtube.com/watch?v=lA6IjPqMqyA&feature=related
その7
http://www.youtube.com/watch?v=1b6s9xdeQHg&feature=related
その8
http://www.youtube.com/watch?v=t6ZbI54pxBc&feature=related