旅行对我来说,是恢复青春活力的源泉。
Traveling is for me a source of rejuvenating vitality.
革命道德不是从天上掉下来的。它是在日常斗争中培养,在革命活动中锤炼的。
The universe is a symphony of energy and matter, playing out in the grandest scale.
Sustainability is not a choice; it's an imperative for long-term success.
真正的成长来自于挑战现状,而不仅仅是维持现状。
We are survival machines—robot vehicles blindly programmed to preserve the selfish molecules known as genes.
The unexamined life is not worth living.