But Contaldi says that GPS synchronization is not nearly that accurate, because GPS satellite signals are themselves subject to gravitational time dilation.
然而卡洛·康泰迪说，用GPS人造卫星来同步时钟，远远达不到这个准确度，这是因为GPS人造卫星的信号本身也受到重力时间膨胀效应的影响。
Objects in a gravitational field experience a slowing down of time, called time dilation.
物体在一种引力场经历的时间减慢，叫做时间膨胀。
Objects in a gravitational field experience a slowing down of time called time dilation.
物体在一种引力场经历的时间减慢，叫做时间膨胀。
Objects in a gravitational field experience a slowing down of time called time dilation.
物体在一种引力场经历的时间减慢，叫做时间膨胀。
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