Human beings have been doing these four types of actions since day one. 人類從第一天就在進行根這標題有關的行動。
In February 2020 we have not got them figured out yet. Perhaps I should say that there are new understandings awaiting our exploration. 今天，在2020年二月理我們仍然埋沒有完全搞懂那些相關的事情。或許我應該說，「仍然有一些新的認識需要我們去探討」
