A countdown calendar is one way to mark time from the present to an important event in the future.

倒计时日历是标明从现在到未来的重要事件还有多少时间的一种方法。

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That ' s called " rigui, " a design in ancient china to mark time, using the movement of the pillar ' s shade under the sunshine.

那个叫「日晷」 ，是中国古代利用太阳投射的影子来测量时间的一种装置。

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One way to mark time is to imagine it carries a clock as it moves, and put markers every second.

标记时间的一种方法是,想像它带着时钟运动,并且每秒做一次标记

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