What is the reason for the egg?
访客6个月前
Eggshell is a phenomenon that early human used bird eggshell as a shelter, and its popularity was closely related to the life style, belief and natural environment at that time. Considering convenience, safety and suitable climate, the single dwelling site has the characteristics of portability, strong defensiveness, environmental protection and energy saving. However, with the development of society, single dwelling has been gradually replaced by other dwelling places, due to increased producti...