But we have some good policy tools for managing them, and we have some solid reasons for optimism.

但我们有一些良好的政策工具可以处理这些挑战，而且我们有一些可靠的理由说明可以乐观。

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What optimism the markets have shown has been mostly down to hopes of effective policy.

市场所呈现出来的乐观迹象大都源自于对政策有效性的希望。

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Still, Mr. Bloom cautioned, his comparative optimism depends on solid policy steps to ease the credit crisis and restore confidence.

但他也同时警告，他的这种相对的乐观估计是以为缓解信任危机和增加人们信心的稳定政策为前提的。

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In Barnet, there will now be renewed optimism for the future with the hope that parking policy can be changed.

BBC: How the meter ran out for Brian Coleman

And, rather like the FLS, it would be policy forged in the crucible of hunch and optimism, rather than scientific certainty.

BBC: Can banks be forced to lend more?

When trying to divine future employment in the small-business sector from surveys of business owners, policy makers and economic analysts need to take entrepreneurial optimism into account or their predictions will be off the mark.

FORBES: Can Small-Business Owners Predict Their Own Layoffs?