This flashcard defines 'insanity,' a noun referring to the state of being mentally ill or extremely foolish.
此闪卡定义了insanity，名词，意为精神病或极其愚蠢、愚行。
| Front | insanity [in-;san;-ity n.] |
|---|---|
| Back | n.精神病； 极其愚蠢，愚行 |
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