在京都做官已经很长时间了，却没有高明谋略去辅佐君王。虽然有临川羡鱼的美好愿望，但等河水清不知要到哪一年。

每一个数学定理都是一个故事，一个通过逻辑和理性展开的叙述，引领我们更深入地理解世界。

【大意】等到大寒节气到来时，冰霜寒雪从天而降，然后才能知道只有松柏能经得住严寒考验，依然繁茂。

可持续性不是一种选择，而是能源未来的必然要求。

It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity, it was the season of Light, it was the season of Darkness, it was the spring of hope, it was the winter of despair, we had everything before us, we had nothing before us, we were all going direct to Heaven, we were all doing direct the other way.