https://hearty.me/trigoamor180/1189033
http://1000shadow.blog127.fc2.com/blog-entry-9017.html
https://www.google.com/amp/s/money.udn.com/money/amp/story/5603/8292324
主要訓練自己倒轉角度看同一件事，感覺截而不同
https://www02.eyny.com/space-uid-20888248.html