Since 1930, no cycle has seen corporate credit spreads narrow so much so quickly, suggesting a rush to anything that pays a yield.
自1930年以来，没有哪个经济周期的企业信贷利差像现在这样快速大幅收窄，这似乎表明人们在一窝蜂追逐任何能产生收益的资产。
The Underdark did not know seasons and had no cycle of light and dark, but the drow still went about their business according to the ancient, forgotten rhythms of their light-dwelling ancestors.
而幽暗地域并不知道春夏秋冬四季变幻，也没有光与暗的往复循环，但是卓尔仍然根据古代早已被遗忘的地表生活祖先们的规律生活着。
If there is no cycle, return null.
如果没有环，则返回空。
If there is no cycle, return null.
如果没有环，则返回空。
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