star-dial

例句：

1. 1. The astronomer used the star-dial to determine the time of day.
   这位天文学家用星盘来确定一天的时间。
2. 2. She was able to read the star-dial on the wall with her telescope.
   她能用望远镜通过墙上的星盘读出时间。
3. 3.The star-dial on the clock showed that it was past midnight.
   时钟上的星盘显示已经过了午夜。