名词
中文翻译：有齿的凹面
同义词：
['toothed recess', "toothed cavity例句：1. The car's engine is a toothed concave that helps it run smoothly.（汽车发动机是一个有齿的凹面，有助于它顺畅运行。）2. The dentist uses a toothed concave to remove the decayed tooth.（牙医使用一个有齿的凹面来去除腐烂的牙齿。）"]
例句：
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1. The car's engine is a toothed concave that helps it run smoothly.
汽车发动机是一个有齿的凹面，有助于它顺畅运行。
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2. The dentist uses a toothed concave to remove the decayed tooth.
牙医使用一个有齿的凹面来去除腐烂的牙齿。
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3.The scientist used a toothed concave to test the strength of the material.
科学家使用一个有齿的凹面来测试材料的强度。