The next step is to design a prospective study so that we can see if these observed differences are actually real.

下一步需要设计一项前瞻性调查，这样我们就能知道是否真的存在这些观测到的差异。

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In a prospective study, participants are followed over time (e.g. across five years), and baseline information is compared with later follow-ups.

在前瞻性研究当中，参与者在一段时间内(例如持续五年)被跟踪调查，基线信息会与后续的信息相比较。

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This kind of study, called a prospective study, is considered more accurate because it does not require people to remember their cell phone use later but tracks it in real time.

这种所谓的前瞻性研究可记录到实际的使用手机时间，比凭记忆估计得到的使用手机时间结果更准确。

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This particular study was a prospective cohort.

这个研究是前瞻性群组研究

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