The largest subfield of physics today is condensed matter.

现今物理学最大的分支学科是凝聚态物质。

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Believe it or not, there's now a whole academic subfield of happiness studies.

不管信与否，在关于幸福的研究中，衍生了一个很大的学术领域。

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Historical linguistics is the subfield of linguistics that studies language change.

历史语言学是研究语言变化的一个分支。

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Yet in another sense political philosophy is something much different than simply a subfield; it seems to be the oldest and most fundamental part of political science.

但从另一个层面来看,政治哲学,相当不同于仅单纯是次领域的学科;,它似乎是最古老且最基础的,政治科学部份。

耶鲁公开课 - 政治哲学导论课程节选

As we'll learn from Jakobson next week, literature can be understood--or what he calls the study of literature, "poetics"--can be understood as a subfield of semiotics, but semiotics is not in itself a literary theory.

下周我们学雅各布森的时候也会看到，文学可以被理解为，诗学，即符号学的一个分支，但是符号学不是文学理论。

耶鲁公开课 - 文学理论导论课程节选

In one sense you could say political philosophy is simply a branch or what we call a subfield of the field of political science. Yes all right.

从一个层面来看，你可以说,政治哲学简单来说，就是一个分支,或说次领域自政治科学,中分离出来，没错。

耶鲁公开课 - 政治哲学导论课程节选

In the subfield of Management people are much more receptive to the idea that Corporate Social Responsibility should also benefit a firm in terms of its profitability.

FORBES: Publication Bias (or, Why You Can't Trust Any of the Research You Read)