名词
中文翻译：流动表面
同义词：
['moving surface', "moving boundary例句：1. The car's running surface is smooth and comfortable to drive.（这辆车的运动表面平滑舒适，驾驶起来很惬意。）2. The river has a running surface that can be easily observed from the bank.（这条河有一个流动的表面，可以从河岸上轻易地观察到。）"]
例句：
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1. The car's running surface is smooth and comfortable to drive.
这辆车的运动表面平滑舒适，驾驶起来很惬意。
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2. The river has a running surface that can be easily observed from the bank.
这条河有一个流动的表面，可以从河岸上轻易地观察到。
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3. The running surface of the track is designed to reduce friction for better performance.
跑道的流动表面设计来减少摩擦，以获得更好的性能。