We can see that these methods extend to all three levels, and involve all types of scientific methods of the first and second level.

我们看到《资本论》所运用的方法遍及各个方法层次，并且在一、二层次中几乎遍及各种类型的科学方法。

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In this paper, the author adopts these methods that combine theoretical research with empirical research and involve qualitative and quantitative analysis.

首先，笔者通过对有关高管团队的现有文献著作进行定性的理论研究之后，提出了本文的各个研究假设和模型。

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