A long night where dawn is difficult to see; metaphorically, a prolonged period of hardship, uncertainty, or difficulty where hope is scarce.
在那个充满挑战的时期，人们普遍感到前途渺茫，如同长夜难明，都在期盼着转机出现。
During that challenging period, people generally felt uncertain about the future, as if in a long night where dawn was hard to see, all hoping for a turning point to appear.
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