seventy       
number [ C ] uk/ˈsev.ən.ti/ us/ˈsev.ən.t̬i/
A2 (数字)70
the number 70
  sixty-nine, seventy, seventy-one 69,70,71 
 This house was built seventy years ago. 这座房子建于70年前。 
 - More examples
 - At seventy, he still retains his impish grin.
 - They nicked him for driving at seventy in a fifty speed limit area.
 - At seventy she was surprisingly broadminded.