Such a study is not a true longitudinal study.

这样的方法并不是真正的贯时性研究。

Retrospective analysis of data from a longitudinal study.

回顾分析纵向调查数据资料。

Longitudinal study is widely applied into medical and biological field.

纵向研究广泛应用于医学、生物学等研究领域。

The data come from the National Longitudinal Study of Adolescent Health.

数据来自美国青少年健康长期研究所。

Vaillant points to the strength of evidence provided by a longitudinal study.

Vaillant指的是纵向研究所提供的强大证据。