You don't need to look for trouble ail the time, but if you have reason to think a coin or bill is a counterfeit, perhaps some of these tips will help you out.

你不必天天自寻麻烦去辨别真伪，但是，如果你有理由认为一枚硬币或一张钞票是假的，也许这些小小的提示将会帮助你。

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Using highly trained specialists to look out for trouble has the advantage that each operator can watch many networks at once, and can thus spot trends that would otherwise go unnoticed.

ECONOMIST: Putting it all together

When Rover, the German-owned remnant of Britain's car industry, was in trouble this summer, he told it to shape up, not look to him for a rescue.

ECONOMIST: The white heat of Mandelson

And the trouble with treating select committee hearings as drama rather than inquisition is that reviewers look for "gotcha" moments and the visible collapse of witnesses, when the real importance may lie in the micro-details of answers given.

BBC: Time to salute the post-2010 election Parliament