名词
中文翻译：凹口
同义词：
['notch', 'notch in', 'notch out']
例句：
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1. The car has a deep notch in the door.
这辆车的门上有一道深深的凹口。
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2. The hunter found a notch in the tree that led to the cave.
猎人在一棵树上发现了一个凹口，通往洞穴。
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3. The tool had a notch on the end for holding the screws.
这个工具末端有一个凹口，用来夹螺丝。