短語(yǔ)詞組短語(yǔ)Simplifying of symbolic expression 符號(hào)表達(dá)式的化簡(jiǎn)Replacing of symbolic expression 符號(hào)表達(dá)式的替換symbolic expression or symbolic speech 象征性表達(dá)expression symbolic 符號(hào)表式 返回 symbolic expression