The remedy is to change the code to cast correctly to the right object.
补救方法是更改代码，以强制转换为正确的对象。
If the XFDL file doesn't open in Mozilla Firefox, then make sure that when you embed the XFDL, you define the right object.
如果XFDL文件没能在MozillaFirefox中打开，请确保在嵌入这个XFDL时，定义了正确的对象。
If the XFDL file doesn't open in Mozilla Firefox, then make sure that when you embed the XFDL, you define the right object.
如果XFDL文件没能在MozillaFirefox中打开，请确保在嵌入这个XFDL时，定义了正确的对象。
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