名词短语
中文翻译：Unknown
同义词：
['Greenwich Mean Time', 'Greenwich Mean Day', 'Greenwich Mean Hour']
例句：
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1. The sunsets at Greenwich Mean Noon in the summer.
夏天太阳在格林尼治平均正午落下。
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2. The clock strikes Greenwich Mean Noon every hour.
时钟每小时报格林尼治平均正午。
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3.They set their watch to Greenwich Mean Noon to ensure they arrive on time.
他们把手表设置到格林尼治平均正午，以确保准时到达。