变分原理 Traditional 變分原理 biàn fēn yuán lǐ 🔊 variational principle (physics) + Keep this word Meanings biàn fēn yuán lǐ 變分原理 variational principle (physics) Its characters 变biànto changeHSK 3分fēnminute (past the hour)HSK 1原yuánformerHSK 5理lǐtextureHSK 6