daystone

例句：

1. 1. The ancient Greeks used daystones to measure time.
   古希腊人使用日晷来测量时间。
2. 2.The sundial at the park was a popular spot for children to play.
   公园里的日晷是孩子们玩耍的热门地点。
3. 3.The sundial is an important tool for farmers to track the passing of time.
   日晷是农民用来追踪时间流逝的重要工具。