But experts say Japan is unique in that sales have been decreasing steadily behind time.

但专家表示，日本的独特之处在于其销售一直在有延迟地稳步下降。

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The steadily growing world population and increasing incomes creates higher demand for meat, but at the same time leaves limited space for expansion in livestock production.

世界人口的不断增长和收入的提高都导致对肉类消费有更高的需求，但同时对扩大畜牧生产的空间造成限制。

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Put options are so dangerous because when markets are volatile, their riskiness does not rise steadily, but spikes very sharply within a very short space of time.

卖出期权的危险在于，当市场动荡不堪时，其风险并非逐步显现，而是在极短的时间内突然爆发。

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Their value will fluctuate every now and then, but will steadily climb over time.

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Since the fumble rate peaked at 4% in 1973, fumbles have declined steadily in the NFL. But come playoff time, everything from nerves to cold weather to aggressive defenders can create major miscues.

WSJ: New England Running Back BenJarvus Green-Ellis Has Zero Fumbles in the NFL

Once upon a time, this body had a crucial role in writing the election manifesto, but Mr Blair has steadily reduced its influence.

ECONOMIST: Bagehot