Levels
来自Big Physics
Safin(讨论 | 贡献)2022年4月28日 (四) 12:48的版本 (建立内容为“Category:etymology == google == [https://www.google.com.hk/search?q=levels+etymology&newwindow=1&hl=en ref] Middle English (denoting an instrument to determi…”的新页面)
Middle English (denoting an instrument to determine whether a surface is horizontal): from Old French livel, based on Latin libella, diminutive of libra ‘scales, balance’.