这个装置的正面有个刻度盘，盘上至少有三根指针，一根用来指示日期，其余两根用来表示太阳和月亮的位置。
A dial on the front of the device probably carried at least three hands, one indicating the date and the other two indicating the positions of the Sun and the Moon.
日晷的主要部件是由一根晷针和刻有刻线的晷面组成，随着太阳在天空运行，晷针的投影像钟表指针一样在晷面上移动，就可以指示时辰。
The main parts of a sundial are an erect stylus and a calibrated disk. As the sun moves in the sky, the shadow of the stylus moves like a clock hand around the disk indicating the hours.
太阳放射饰纹表盘上设有太妃形指针，指示小时和分钟。
Sun-brushed dial features a toffee-shaped pointer indicates hours and minutes.
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