名词
中文翻译：等距
同义词：
['equal distance', 'equal interval']
例句：
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1. The two cities are approximately 500 kilometers apart.
这两个城市相距大约500公里。
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2. We need to maintain a certain level of distance between the two groups.
我们需要保持两组之间的一定距离。
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3. The train will travel at a constant speed until it reaches its destination.
火车将以恒定的速度行驶，直到到达终点。