名词
中文翻译：Unknown
同义词：
['interval', 'gap', 'margin']
例句：
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1. The distance between the two cities is about 500 kilometers.
两座城市之间的距离大约是500公里。
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2. The time difference between these two countries is significant.
这两个国家之间的时间差很大。
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3. The distance between the sun and the earth is approximately 93 million miles.
太阳和地球之间的距离大约是9.3亿英里。