大约3

• Our flying time is about 3 hours , we will be arriving at guangzhou at 11 am
  我们的飞行时间大约3小时，预计上午11点到达广州。
• " about three years ago , i went to a clinic and signed up for their drug program
  “大约3年前，我去了一家诊所并签了他们的戒毒计划。
• The disorder may account for approximately 3 % of all consultations referred from primary care
  进行初级护理咨询的病人中，大约3患有该病。
• Yes , we listened for about 3 hours and heard “ san gao ” singing in the forbidden city
  是的，我们听了大约3个小时，听见了“三高”放歌紫禁城。
• B : yes , we listened for about 3 hours and heard “ san gao ” singing in the forbidden city
  是的，我们听了大约3个小时，听见了“三高”放歌紫禁城。
• About 3 feet of snow and ice fell on the states , closing highways and stranding motorists
  地面上接起了大约3英寸的冰雪，高速公路被迫关闭，路人被迫滞留。
• Spiders are totally old . scientists think they first appeared about 380 million years ago
  蜘蛛是很古老的生物。科学家们认为它们早在大约3亿8千万年前就出现了。
• About 100 cattle were killed from a second infected herd on a farm about 3 kilometers from the first
  距离第一批大约3公里的地方，第二批染病的约100头牛也被杀。
• Notebook theft is on the rise nearly 30 , 000 notebooks were stolen in airports alone last year
  本本丢失案件有上升趋势,每年都有大约3万个本本在机场或其他地方被盗
• Let ' s retell the dialog according to the key words and phrases on the screen
  利用上步找出的关键词，不看课本来复述对话，给学生大约3分钟的时间来自己组织语言复述。