短語詞組短語le signe plus plus sign 加號plus or minus sign 正負(fù)號;加號或減號plus -minus sign of electric current 電流正負(fù)號the plus sign 正號plus sign additive sign 符號為PLUS SIGN BELOW 下面帶有加號combined plus and minus sign 正負(fù)復(fù)合符號 返回 plus sign