名词
中文翻译：圆弧线
同义词：
['circle line', 'arc line']
例句：
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1.The engineer drew a roundline on the map to indicate the route.
工程师在地图上画了一条圆弧线来指示路线。
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2.The construction workers used a roundline to mark the foundation of the building.
建筑工人使用圆弧线来标记建筑物的基础。
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3.The driver followed the roundline as instructed by the traffic officer.
司机按照交通官员的指示沿着圆弧线行驶。