be in/out of luck idiom  informal      
C1 能够/未能如愿,运气好/差
to be able/unable to have or do what you want
  "Do you have any tuna sandwiches?" "You're in luck - there's one left." “你们这里有金枪鱼三明治吗?”“你的运气不错——还有一个。” 
 
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