短語(yǔ)詞組短語(yǔ)Kronecker 's delta 尅朗尅內(nèi)尅符號(hào)para -Kronecker delta 倣Kronecker符號(hào)kronecker delta function kronecker δ函數(shù);函數(shù)kronecker delta property 特性 返回 Kronecker delta