了三

• Our school chartered three buses for the trip ..
  我们学校为那次旅行包了三辆公共汽车。
• This object has been photographed at a magnification of 3 .
  此物体拍照时已放大了三倍。
• He struck three times on the door .
  他敲了三次门。
• Three years of working as an assistant were enough for us .
  当了三年助教，我们感到腻了。
• They have placed an order with us for three new aircraft .
  他们向我们订购了三架新飞机。
• I am exhausted . the baby woke up three times in the night .
  我累坏了。孩子夜里醒了三次。
• The river had been dammed here to form three lakes .
  这条河在这里用闸拦住，形成了三个湖。
• It took them nearly three hours to get in all the money .
  他们几乎花了三个钟头才把钱收齐。
• Three landmarks stand out .
  经历了三个里程碑。
• One army corps lost two thirds of its transport animals .
  有一个军团死掉了三分之二的驮畜。