logo symbol sign 的区别

logo symbol sign 的区别 sign & symbol的区别? sign signal symbol的区别 sign,symptom,symbol的区别 sign 与 logo的区别 example ,sign ,mark ,symbol的区别 symbol sign signal 的详细区别, sign和symbol 区别是? mark symbol sign signal这几个词的区别. mark symbol sign signal四个词的区别? mark symbol sign signal这几个词的区别是什么? symbol,sign,signal,mark区别有哪些?好懂点的