不要让昨天占据今天的太多时间。
The most important political development of the last half century has been the spread of liberal democracy around the world.
行动对生命是很重要的，教育不能策划出让生命缓和下来或压抑它的方法。
And when his audience grew bored, he would spring into the air and do a back flip with a half twist.
Where is the wisdom we have lost in knowledge? Where is the knowledge we have lost in information?