肘尺
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定义
一种古代长度单位，基于肘部到中指指尖的距离，因文明不同通常在45至52厘米之间。
解释
One of humanity's oldest recorded measurements, the cubit appears in Egyptian, Babylonian, Hebrew, and Roman texts. The Royal Egyptian cubit (~52.4 cm) was standardized using a granite master rod and used to build the Great Pyramid of Giza with remarkable precision. The shorter 'common cubit' of roughly 45 cm is the one referenced in most biblical descriptions, including Noah's Ark.
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