形容词
中文翻译：凹的
同义词：
['concave', 'inward-turning']
例句：
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1.The concave shape of the bowlis perfect for holding liquids.
碗的凹形设计非常适合装液体。
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2. The car's roof was designed to beconcave, providing a smoother ride.
汽车的顶棚设计成凹形，提供了更平稳的乘坐体验。
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3. Theconcave surface of the rock iscovered with moss and lichen.
岩石的凹面覆盖着苔藓和地衣。