Base
IMathSubscriptElement.Base 属性
Base 参数
public IMathElement Base { get; }
示例
示例：
[C#]
IMathElement baseElement = new MathematicalText("X");
IMathElement subscript = new MathematicalText("i");
MathSubscriptElement subscriptElement = new MathSubscriptElement(baseElement, subscript);
IMathElement baseElem = subscriptElement.Base;
