形容词
中文翻译：凹的
同义词：
['concave', 'concave-sided', 'concave-sided']
例句：
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1. Thecar has a concave roof that looks very stylish.
这辆车有一个凹顶，看起来非常时尚。
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2. The concave shape of the rock is fascinating to observe.
岩石的凹面形状令人着迷。
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3.The concave surface of the bowl is smooth and easy to hold.
碗的凹面表面光滑且易于握持。