"We cannot stop terrorism or defeat the ideologies of violent extremism when hundreds of millions of young people see a future with no jobs,no hope and no way ever to catch up to the developed world,"

VOA: standard.2010.01.06

We are going to have to stop doing that because we cannot find an individual electron.

我们正要停止那么做,因为无法发现一个独立电子。

麻省理工公开课 - 固态化学导论课程节选