名词
中文翻译：子午仪
同义词：
['meridian', 'sundial']
例句：
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1.The meridian instrument was used to measure the time of day.
子午仪被用来测量一天中的时间。
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2. The sundial was a popular tool for measuring time during the summer months.
日晷是夏季测量时间的一种流行工具。
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3. The meridian instrument is essential for navigation and timing in many fields.
子午仪在许多领域对于导航和计时至关重要。