For several decades now, researchers have pointed to excessive care as an important factor behind spiraling health care costs.

几十年来，一直有研究人员指出过度诊疗是隐藏在节节攀升的医疗费用背后的一个重要因素。

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For several decades now Dutch farms, agribusiness, research and education have sustained international top positions in their respective fields.

几十年来，荷兰农场，农业企业，研究和教育在各领域都保持着国际领先地位。

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The options have been traded for several decades, starting with the Chicago Board Options Exchange. But now there are many options exchanges.

发源于芝加哥期权交易所，期权已经交易了几十年了。

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But this price problem has been building for several decades now.

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The bay is slowly improving but not at a fast enough rate, especially considering that we have been working at this for several decades now, actually 30 or 40 years.

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These are just some of the reasons the average age at first marriage has been rising for several decades and now hovers around 27 for women and 29 for men.

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