Squares being a logical and standard shape for frames (as of window and picture varieties), it's easy to understand why French speakers and later English speakers adopted cadre as a word meaning " frame" .

正方形是框架的逻辑和标准形状（如窗户和图片品种），很容易理解为什么法语使用者和后来的英语使用者采用 cadre 作为意思是“框架”的词。