Moreover, to ensure more generalizable results, the time of the follow-up observation should be prolonged, and studies of large-scale samples with multi-variables should be conducted.

应尽可能延长追踪观察的时间，并进行大样本多变量研究，以保证研究结果的普遍性。

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My own research at the Stanford Center on Adolescence uses in-depth interviews with small samples of youngsters rather than large-scale surveys.

我个人在斯坦福青少年研究中心的研究采用的是对小样本的青少年进行深入访谈的方式，而不是大规模的调查。

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Thus, the vast majority of genetic samples used in large-scale studies come in the form of blood.

因此，在大规模的研究中所使用的绝大多数基因样本都是血液的形式。

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Lundin also believes that large-scale digitization of all tissue samples will also allow for the development of a whole new field of image-based analysis methods.

FORBES: The Socialization of Microscopes

Police forces in England and Wales have begun a large-scale operation to collect DNA samples from about 12, 000 serious offenders who are not on the national DNA database.

BBC: A DNA autoradiogram