名词
中文翻译：间隔
同义词：
['interval', 'gap', 'interval between']
例句：
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1.The distance between the two cities is about 200 kilometers.
两座城市之间的距离大约是200公里。
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2. The gap between the two countries has narrowed over time.
两国之间的差距已经缩小了。
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3.The interval between the two events was too short to notice any differences.
两个事件之间的间隔太短，以至于无法察觉任何差异。