名词中文翻译
中文翻译：凹底
同义词：
['concave', 'recessed bottom']
例句：
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1.The boat has a concave bottom that allows it to glide smoothly through the water.
这艘船有一个凹底，让它能够平滑地在水中滑行。
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2.The car's concave bottom is designed to absorb impact and protect passengers from injury.
汽车的凹底设计用来吸收冲击并保护乘客免受伤害。
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3.The floor of the cave was concave, with a deep recess at its center.
洞穴的地板是凹形的，中心有一个深深的凹槽。