This flashcard explains 'arduous,' an adjective meaning 'requiring great effort' or 'difficult.'
该闪卡解释了“arduous”，它是一个形容词，意为“艰巨的”或“努力的”。
| 单词 | arduous |
|---|---|
| 音标 | [ˈɑ:djuəs] [ˈɑ:rdʒuəs] |
| 释义 | adj.["努力的","艰巨的","难克服的","陡峭的"] |
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