名词
中文翻译：弓形
同义词：
['bow', 'curve', 'arch']
例句：
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1. The arrowhead is shaped like a bow.
箭头头形状像弓。
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2. The river flows in a zigzag pattern, resembling an arch.
河流蜿蜒流淌，像一座拱桥。
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3. The car's roof is designed to be retractable, giving it the appearance of an arch.
汽车的顶棚可以收起，给人一种拱形的印象。