名词
中文翻译：方形凹槽
同义词：
['rectangular groove', 'square recess', 'rectangular notch']
例句：
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1. The car has a square groove in the center of its body.
这辆车的车身上有一个方形凹槽。
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2. The machine has a square groove on its side for easy cleaning.
这台机器的侧面有一个方形凹槽，便于清洁。
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3. The groove in the wall is perfect for hanging pictures and artwork.
墙上的凹槽非常适合挂画和艺术品。