變分原理 Save Sign in to save words Simplified: 变分原理 biànfēnyuánlǐ ㄅㄧㄢˋ ㄈㄣ ㄩㄢˊ ㄌㄧˇ variational principle (physics) Character by character 變(biàn)change 分(fēn)divide 原(yuán)surname Yuan 理(lǐ)texture A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0