电流概念的形成是电学理论发展中最重要的步骤。

我们生来都是疯狂的，有些人一直如此。

我相信简单的生活，有纪律的生活，专注的生活。

科学不仅是事实的集合，也是一种思维方式。

The best way to measure your investing success is not by whether you're beating the market but by whether you've put in place a financial plan and a behavioral discipline that are likely to get you where you want to go.

绝望是活着的证明。