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小典故从木筏到舟船中国原始人多沿水从事渔猎活动,偶见树木漂流而过,认识到水与木头及其他浮物的关系,即开始用独木作为渡水浮具。后来为了上面能够搭载物品,人们模拟树叶的形状,将两根以上的木头捆绑起来,便形成了最早的木排——木筏,再后来又出现了竹筏。大约在8000年前,中国出现了独木舟,既而演变成舟船。独木舟的发明,人们有意无意中运用了性质逆向法——通过采用(或制作成)空心的物体,来减小物体整体的密度。
Small allusions from the raft to the boat China’s primitive people are engaged in fishing and hunting activities along the water, and occasionally drifting trees, aware of the relationship between water and wood and other floating objects, that is, the beginning of the use of single-wood as a floating float. Later, in order to be able to carry the items above, people simulated the shape of the leaves and tied up more than two pieces of wood to form the first raft, raft, and then bamboo raft. About 8,000 years ago, China emerged as a canoe, which evolved into a boat. Canoe invention, people intentionally or unintentionally used the nature of reverse law - through the use of (or made into) hollow objects, to reduce the overall density of the object.