名词
中文翻译：水壶的凹陷
同义词：
['pot depression', 'kettle pot depression']
例句：
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1.The kettle has a deep depression in the bottom.
水壶底部有一个深凹。
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2.The kettle was made with a pot depression that makes it easy to pour water.
这个水壶底部有一个凹陷，使得倒水变得容易。
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3. The kettle pot depression is where the water collects when you boil it.
水壶底部的凹陷是水沸腾时聚集的地方。