据某些专家的考证，握手是石器时代穴居人留下的一种遗俗。
According to some experts to research, the handshake is left of the Stone Age cave dwellers who left a vulgar.
据专家考证，海草房的起源，当追溯到新石器时代，只是那时的民居建筑只是简陋的栖身之所，尚不是真正意义上的民居建筑。
According to textual research of experts, origin of seaweed houses can be traced back to the Neolithic Age. Folk houses at that time were simple dwellings, but not folk houses in the real sense.
同时，考证出中国的战国时代已食用豆豉，西汉时代已食用豆腐。
Meanwhile, fermented and salted beans are eaten early in the Warring States period and tofu is eaten early in Western Han Dynasty.
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