Slough of Despond
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- a deep boggy place in John Bunyan's The Pilgrim's Progress between the City of Destruction and the gate at the beginning of Christian's journey绝望之渊（约翰·班扬《天路历程》中毁灭之城与主人公克里斯琴开始旅程的大门之间的一块深沼泽地）。
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- as noun a state of hopeless depression绝望状态：
while everyone is having a blast I am sinking into the Slough of Despond.
大家都在狂欢作乐时, 我却陷入绝望的深渊。