This flashcard teaches the English word "vain," which has two meanings: excessively proud of oneself (conceited) or producing no result (futile).
这个卡片教授了“vain”这个英语单词，它有两个意思：自己认为自己很棒（自负的），或者努力白费了（徒劳的）。
| Front | vain |
|---|---|
| Back | 自负的，徒劳的 |
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