Feraci said that if prolonged, the economic downturn will lead to a retraction in U. S. biofuel production.

费拉西说，经济衰退如果持续下去，美国生物柴油产量将出现下降。

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The next phase will attempt to find out if prolonged Pill use pushes back the menopause, as this theory suggests it should.

ECONOMIST: The Pill

The composite rate can never go below 0%, so even if we experience a prolonged period of severe de flation, the I Bonds will still help protect the future spending power of your investment.

FORBES: Inflation Is Back And So Are I Bonds

If the company has sustained prolonged payment delays it could begin to erode its stock price.

FORBES: Signs That It Might Be Time To Sell