If the listener is not paying attention, it's your sign to shorten the story or change direction.

如果听者不专心，这表明你应该缩短故事或改变话题。

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How you manage and cope with change is a sign of your professionalism and maturity.

如何处理和应付变化是你的职业特性和成熟的标志。

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Ayatollah Ali Khamenei said in an address Saturday despite the new administration's slogan of change, there has been no sign of genuine change in what he termed hostile U.S.policies toward Iran.

VOA: standard.2009.03.23

One clear sign of change is the bank's newfound enthusiasm for lending to small businesses.

ECONOMIST: European Bank for Reconstruction and Development

So the upheaval now may be a sign that change is afoot.

ECONOMIST: The Tour de France is not dead yet

Another potent sign of change is that a motion to buy more time to think about gay ministers without any commitment to change was narrowly defeated.

BBC: Mood shift points to gay clergy for the Kirk