"Stupid" 源于拉丁语 "stupidus"，意为 "发呆的" 或 "呆滞的"。"Foolish" 源于古英语 "ful"，意为 "愚蠢的"。
例句：
He's so stupid that he can't even tie his own shoes. 他太愚蠢了，连鞋带都系不好。
Don't be foolish and try to climb that mountain by yourself. 别傻乎乎地一个人爬那座山。
"Demented" 源于拉丁语 "dementere"，意为 "精神错乱的"。"Senile" 源于拉丁语 "senilis"，意为 "老年的"。
例句：
The old man was so demented that he didn't even recognize his own son. 那个老人精神错乱得连自己的儿子都认不出来。
His senile mind often causes him to forget things easily. 他老年的大脑常常让他容易忘事。
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最佳回答 2023-05-07