单词	hat tip
释义	hat tipˈhat tip noun [countable] an expression of thanks, especially for information or an ideahat tip to A hat tip to Fiona Smith, who drew this case to my attention.
随便看	737 747 7/7 7-Eleven 7-Up 8 800 number 911 9/11 9-11 Commission 99 999 A* A a a- A-1 A1 A3 A4 A5 AA AAA aardvark aargh

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