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afford to do和afford doing的区别 afford doing or to do afford to do 意味 afford to do sth什么意思 afforded or afforded to afford definition and usage to be afforded meaning what does affording mean 

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afford to do和afford doing的区别 afford与afford to do afraid of doing与to do的区别 afford to do sth afford to do的用法 afford to doing something afraid of 与to do的区别 afraid of doing与to do的区别哪个表结论 afford sth/to do sth afraid to do和afraid doing有什么区别 

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