accurate arrival time

例句：

1. 1. The measurements were accurate to within half a millimeter.
   这些测量准确到半毫米以内。
2. 2. The scientist used an accurate scale to weigh the samples.
   科学家使用一个准确的秤来称量样品。
3. 3.The engineer designed an accurate clock that could be set to any time of day.
   工程师设计了一个准确的时钟，可以设定为任何一天的时间。