新发现是基于美国各地的医院向全国医疗安全网提交的数据，这是疾病预防与控制中心的感染监测系统。
The new findings are based on data submitted by hospitals across the U. S. to the National Healthcare Safety Network, which is the CDC's infection monitoring system.
据联邦疾病预防与控制中心称，一半以上的儿童在某个时段，尤其在2到12岁之间的某个时段，容易晕车。
Up to half get carsick at some time, and the condition peaks between ages2 and12, says the federal Centers for Disease Control and Prevention.
位于亚特兰大的美国联邦疾病预防与控制中心的特里·皮查西科说：“这是最显著的迹象，显示我们所取得的伟大进步已经停止了。”
"This is the most dramatic indication that the great progress we're making has stalled," said Terry Pechacek of the federal Centers for Disease Control and Prevention in Atlanta.
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