视频介绍
关于箭头的设计。
参考资料：
Arrow (symbol)
https://en.wikipedia.org/wiki/Arrow_(symbol)
The Story behind the Subway Logo and its Meaning
https://www.freelogodesign.org/blog/2020/07/03/the-story-behind-the-subway-logo-and-its-meaning
History of the Arrow
https://printi