thirty [ˈθɜ:rti]

例句:

• By 1973 the government deficit equalled thirty per cent of GNP.
  到1973年，政府财政赤字相当于国民生产总值的30%。
  
• I know that you'vebeen studying chimpanzees for thirty years now.
  我知道你研究黑猩猩至今已有30年了。
  
• Thirty years ago, Paul Weller was number one.
  来自BBC
• Thirty seconds later she reappeared and beckoned them forward.
  30秒后她又出现了，示意他们往前来。
  
• Thirty-one inmates are now taking part in the strike.
  来自VOA
• Our attempt at emulating other thirty-somethings was perfectly planned.
  来自THETIMES