The difficulty of a problem was defined in terms of how long it took to complete.

问题的难易度是以解决这个问题所花时间的长短而定的。

《牛津词典》

The new law goes a long way towards solving the problem.

新的法律十分有助于解决这一问题。

《牛津词典》

For a long time this problem has been swept under the carpet.

很长一段时间这个问题一直被掩盖着。

《柯林斯英汉双解大词典》

Stuttering's cause has long been a mystery, but it has frequently been diagnosed as a psychological problem.

VOA: standard.2010.02.11

But remember that you do have recitation on Tuesday, so that could be very helpful with the problem-set, so be sure to go to recitation on Tuesday, and have a great long weekend.

记住，周二有习题课，这对做课后题很有帮助，所以周二一定要来上习题课，周末愉快！

麻省理工公开课 - 化学原理课程节选

That's what we have to think about and it's a long-term problem.

这是我们要考虑的问题,这是个长期问题。

耶鲁公开课 - 金融市场课程节选

They were always behind the curve in dealing with the crisis because they perceived it as still a liquidity problem long after it became a confidence problem.

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"We're looking for a short-term problem where the market anticipates a long-term problem, " he says.

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Dickey is a short term fix to a long term problem for the New York Mets.

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