形容词
中文翻译：Unknown
同义词：
['stupid', 'dull', 'foolish', 'clumsy']
例句：
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1. He is a very stupid person who can't even spell his own name correctly.
他是一个非常愚蠢的人，连自己的名字都写不好。
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2. The old man was so dull that he couldn't understand the jokes being told by his grandson.
老人非常迟钝，听不懂孙子讲的故事。
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3. The child was foolish for playing with matches in the house.
孩子在房间里玩火柴是愚蠢的行为。