In such studies, researchers would need to follow groups of children with and without music lessons over a long period of time—even if the assignments are not completely random.

在此类研究中，研究人员需要在很长一段时间内对上音乐课和未上音乐课的不同小组的儿童进行追踪——即使任务并不是完全随机的。

youdao

Diabetes is caused by a group of metabolic disorders in which there are high blood sugar levels over a long period of time.

糖尿病是由一组代谢紊乱引起的，代谢紊乱后，血糖水平长期偏高。

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For a long period of time and in many parts of the country, a traveler was a welcome break in an otherwise dull existence.

很长一段时间，在美国的许多地方，旅行者是一种受欢迎的打破沉闷生活的方式。

youdao

So,to get a sense of what the regional moisture patterns have been, dryness and wetness over such a long period of time in great detail, I would call it a kind of victory for paleoclimate science."

VOA: special.2010.05.25

Clearly, important information is to be conveyed to students from people who settle in the fields for a long period of time.

显然，对某个领域,进行长时间研究的学者,会将重要的信息,传达给学生。

麻省理工公开课 - 媒体、教育、市场课程节选

There was certainly a long period of time in which I found the personality theory, that is,the personality theory with a no branching rule, to be the better and more plausible theory.

有一段时间内，我觉得无分支理论下的，人格理论，是更好更合理的理论。

耶鲁公开课 - 死亡课程节选

It is not the first time they have felt like this in a long period of time.

BBC: FA explains player silence

That can be either a specific housing complex or a larger neighborhood in which many of the residents have aged in place over a long period of time and need a range of support services in order to continue living in their homes.

MSN: Aging in place: Most seniors want to stay put

Mobile graphics technology has come a long way in a short period of time, and it's continuing to evolve.

CNN: Gaming is a top priority for mobile-tech makers