我们祖先面临的主要生存威胁 - 捕食者、饥饿、疾病 - 在我们的恐惧和焦虑中留下了印记。
It is not enough to observe and experiment, theorize and calculate. One must also imagine.
Friends have all things in common.
Life is so short, so beautiful. Don't be so serious about work. Enjoy the life.