Mental activity is the organism's way of engaging with the world.
哭着送去,哭着回来,回来后要努力于衣食之物的生产,资助祭祀,并用来孝顺双亲。 
不学《诗经》,就无法表达自己的意思;不学习《礼记》,就无法在社会中立足。
The petrochemical industry must adapt to the low-carbon trend to remain relevant in the future.
The proper function of man is to live,not to exist.