You place text and graphics objects on the page with the same postfix syntax as that of the multiplication and addition example above.
在页面中布置文本和图形对象与上文的乘法和加法示例使用的postfix语法相同。
If you could not pop two operators, the syntax of the postfix expression was not correct.
如果您不能够弹出两个操作数，后缀表达式的语法就不正确。
If you could not pop two operators, the syntax of the postfix expression was not correct.
如果您不能够弹出两个操作数，后缀表达式的语法就不正确。
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