Substantial uncertainty around a favorable outlook calls for policy flexibility rather than continued stimulus by default.

良好的经济前景面临的大量的不确定性要求保持政策的灵活性，而不是盲目地继续实行经济刺激。

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Is why, he intimates, I fail to appreciate the consumption decisions facing real people who face substantial uncertainty.

这就是为什么他暗示，我不能理解那些面临巨大不确定性的人们所作出的消费决定。

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"So while substantial uncertainty remains, clinical severity appears less than that seen in 1918, but comparable with that seen in 1957," says the journal report.

“因此，虽然还存在着大量的不确定性，临床的严重度似乎还低于1918年，但比得上1957了。”期刊报道说。

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There remains substantial uncertainty about whether this drug is worth taking.

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This forecast is of course subject to substantial uncertainty.

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In every direction there is uncertainty, fear, trepidation, and yes, a substantial perception of risk.

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