javascript 中的 prototype 多继承
https://www.ueder.net/2010/10/25/javascript-%E5%A4%9A%E9%87%8D%E7%BB%A7%E6%89%BF%E5%B0%8F%E8%AE%B0/https://www.ueder
javascript 中的 prototype 多继承
https://www.ueder.net/2010/10/25/javascript-%E5%A4%9A%E9%87%8D%E7%BB%A7%E6%89%BF%E5%B0%8F%E8%AE%B0/https://www.ueder