The tentative idea I have is that there are some nodes in time which is fixed by some sort of Mathematic invariant, which is unchangable whatsover.

• 它们在什麽时间合作无间；什麽时侯会有冲突?13.；中国文化中道家思想和儒家思想的张力；前者主张自然无为；而后者相当入世及功利。