She was alternately worried and sanguine about her chances of being rescued.
- Elliot Ackerman "Why are't we evacuating Americans from Sudan?" The Atlantic, Apr 25, 2023
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这句话很短，但很有力，尤其alternately这个词用得好。
不是simultaneously，也不是both，而是一会儿担忧（worried），一会儿又满怀信心（sanguine），两种情绪忽明忽暗像两只吊桶不能自已。
一个准确的副词 alternately 把那种身处绝境前途未卜的茫然和隐隐的乐观心境描写得无比逼真。
Sanguine 形容一个人confidently optimistic and cheerful，意涵比一般的optimistic还要乐观。
Referencehttps://www.theatlantic.com/magazine/toc/2023/04/