几十年来，毛皮贸易一直控制着海狸鼠的数量，但在20世纪80年代末，海狸鼠毛制品市场崩溃，导致这种猫大小的动物的数量疯涨。
The fur trade kept nutria in check for decades, but when the market for nutria collapsed in the late 1980s, the cat-sized animals multiplied like crazy.
即使在六亿五千万可调利率次优贷款中有五分之一变成不良贷款，对于四十万亿美元的债务市场来说，不过是九牛一毛。
Even if a fifth of the $650 billion of adjustable-rate subprime loans went bad, that would be a blip in the $40 trillion market for debt.
同几年前的九牛一毛相比，现如今，基金经理将高达5%的现金都投入商品期货市场。
Fund managers, who allocated a pittance to commodities a few years ago, now put up to 5% of their cash into them.
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