熊市往往起于繁荣盛世之后：19世纪中期的铁路热，咆哮的二十年代以及网络泡沫。
Bear phases are generally preceded by great booms: the railroad mania of the mid-19th century, the Roaring Twenties, and the Internet bubble.
熊市往往起于繁荣盛世之后：19世纪中期的铁路热，咆哮的二十年代以及网络泡沫。
Bear phases are generally preceded by great booms: the railroad mania of the mid-19th century, the Roaring Twenties, and the Internet bubble.
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