The best scientific discoveries often happen at the interface of different disciplines.
We must mine coal responsibly today so that our children inherit both energy security and a healthy environment.
Dictatorships breed fear, fear breeds silence, silence breeds oppression.
Every mathematical problem has a solution; it just takes time and creativity to find it.
生命是一份禮物，它賦予我們特權(quán)、機(jī)會和責(zé)任，通過成長來回報。