音標(biāo)發(fā)音英式音標(biāo) [s?b?tr?k.??n ?sa?n]美式音標(biāo) [s?b?tr?k.??n ?sa?n]英式發(fā)音 美式發(fā)音 基本解釋減號(hào)；負(fù)號(hào)。同根派生 subtraction sign相關(guān)詞英英字典劍橋英英字典 the symbol ? , used to represent subtraction or show that a number is less than zerosubtraction sign劍橋字典subtraction sign柯林斯字典