In this note the following result is proved Theorem 2. Suppose R is an associative ring satisfying that x, y∈R, here exist two words ω(X, Y)and τ(X, Y), depending on x, y, with|ω|,Y,>,1, τ|,Y,=1, such that ω(x, y)=τ(x, y) Then ⅰ) R is commutative if R is a Kthe semi-simple ring. ⅱ) R is commutative if R is a semiprime ring and min(|ω|, |τ|,<,C, where C is a constant.