名词
中文翻译：流动表面
同义词：
['flowing surface', 'flowing boundary', 'flow line例句：1. The river flows through the valley', 'creating a beautiful landscape.（河水流过山谷，创造出美丽的景观。）']
例句：
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1. The river flows through the valley, creating a beautiful landscape.
河水流过山谷，创造出美丽的景观。
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2.The flow surface of the liquid is smooth and even.
液体的流动表面平滑且均匀。
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3. The engineer designed the flow surface to minimize friction.
工程师设计了流动表面以最小化摩擦。