Nine is usually thought of as a lucky number because it is the product of three times three.

9通常被认为是一个幸运数字，因为它是3乘以3的乘积。

youdao

The seven-to-nine-year-olds thought parents would be angry with their confessions.

七到九岁的孩子认为父母会对他们的坦白感到愤怒。

youdao

And before anyone feels compelled to criticize our aesthetics, please remember that this was nine years ago—we were young, broke, and thought fairy lights were the ultimate in home décor.

朋友们，请且慢批评我们的美学眼光，要知道这毕竟是九年前，我们年轻而贫穷，圣诞树小彩灯是我们装饰房间的唯一手段。

youdao

Irving Berlin thought so,too. He wrote "White Christmas" in nineteen thirty-nine.

VOA: special.2009.12.20

The cow finished drinking, and as the nine-year-old child hurried through the forest to the home she loved, she thought again about the noisy town where her parents still lived.

VOA: special.2010.04.03

Twenty-nine percent thought there was too much criticism, 24 percent too little and 36 percent the right amount.

CNN: Survey: Shock from terror attacks receding

Only nine are thought to have survived.

FORBES: Tibet Needs Entrepreneurs Like The Tatas And Rockefellers

And who would have thought, 15 years ago -- who would have thought maybe nine months ago we would be here.

WHITEHOUSE: President Obama Welcomes the UConn Huskies