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Toys and games
1) Devices that are used exclusively for recreation and play. Toys are most often used with children and pets and as a medium of education and development. Toys are not always obvious in their nature. A simple bottle can be considered a toy if an individual uses it for recreational use. 2) Games are structural activities used for physical or psychological education. In most cases, games are recreation. However, games can also be considered work. For example, a professional soccer game is a career to the participants.
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類似的結構
Archaeology; Evolution
在不同的物種,看上去都一樣,或執行類似功能 (例如,蝴蝶的翅膀) 和鳥的翅膀,convergently 已經進化,但不是會從類似組的胚胎學組織,發展和他們沒進化從已知的共同祖先能共用的結構相似的結構。同源結構與 對比。注: 深遺傳同源最近發現帶來了新的興趣、 新資訊和古典的類似和同源結構概念的討論。 ...