The Erdős discrepancy problem fascinated me because it was so simple to state yet so deep in its implications.
埃尔德什差异问题让我着迷,因为它陈述起来如此简单,但含义却如此深刻。
Happiness ain't a thing in itself --- it's only a contrast with something that ain't pleasant. That's all it is.
每一枪都很重要,每一刻都很关键。