您应当用Portal卸载软件从机器中卸载Portal的安装，但是在特定的情况下，例如一个失败的安装，这种方法就不起作用了。
You should use the Portal uninstaller to remove a Portal installation from the machine but in certain cases such as an aborted installation this may not work.
如果广告失败，对销售不起作用，就得对整个广告过程进行重新检查。
If the advertising fails, having no effect on sales, the whole programme will be reviewed.
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