标签：查尔斯·凯特灵

2018-04-27帕布莉卡阅读(648)评论(0)赞(0)

“A problem well stated is a problem half solved.” – Charles Kettering, Inventor 「清楚的陈述问题，你就解决了问题的一半。」– 查尔斯‧凯特灵 (发明家) 查尔斯...