是一个时钟的演示。可以拖入多个时钟同时进行比较删除，可以随意切换背景色，以及设置颜色和大小包括指针的大小。还有更改时区。-Demonstration of a clock. You can drag the clock at the same time to compare multiple delete, you can freely switch the background color, and set the color and size, including the size of a

在天文学中实现动态时区转换和平时恒时转换-achieved in astronomy,dynamic time zone conversion,and usually when the conversion constantly

一个世界时钟程序可以显示出多个不同时区的当前时间-A world clock program can display a plurality of current time in different time zones