名词
中文翻译：沙漏
同义词：
['silica sand timer', 'hourglass']
例句：
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1. The ancient Egyptians used a simplified version of the sand-filled hourglass to measure time.
古埃及人用一个简单的沙漏来测量时间。
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2. In medieval times, people often used a sand-filled hourglass to keep track of time duringlong days at work.
中世纪时期，人们经常使用一个沙漏来记录长时间工作期间的时间。
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3. The sand in the hourglass is slowly moving, reminding us that time is always passing.
沙漏中的沙子慢慢移动，提醒我们时间总是在流逝。