The next President faces an entirely different challenge, grappling with
seismic changes in which the choices are confusing, the directions obscure.
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這是書上介紹 obscure 這個字所給的例句！！
obscure不是形容詞嗎?! 為什麼這裡 obscure前沒加 be-V?!
還是書上漏印了?!