The world is not divided into good people and Death Eaters.
世界并不是简单地分为好人和食死徒。
In computer science, we often deal with problems that are easy to state but hard to solve.
形容时光飞逝，人生易老，鸡鸣和马蹄声象征着时间的流逝
The past is never really past—it shapes who we are.
在快速变化的市场中，唯一不变的就是客户的需求。