thirteen       
number uk/θɜːˈtiːn/ us/θɝːˈtiːn/
A1 (数字)13
the number 13
  Some people think that thirteen is an unlucky number. 一些人认为十三是个不吉利的数字。 
 There were twelve or thirteen people waiting at the bus stop. 有十二三个人在公共汽车站等车。 
 - More examples
 - thirteen, fourteen, fifteen
 - Three from sixteen is thirteen.