In the parlance of quantum mechanics, however, to call a particle pointlike is to say no more than that it is elementary, ie, that it is not known to be made up of smaller bits.

而在量子力学术语中，“点粒子”即为“基本粒子”（迄今还未发现有用来构成基本粒子的更小单位）。

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This class will study some of the changing ideas within modern physics, ranging from relativity theory and quantum mechanics to solid-state physics, nuclear and elementary particles, and cosmology.

本课程将会研究现代物理学中在概念上的变迁，从相对论、量子力学到固态物理、原子核与基本粒子、还有宇宙论。

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This situation makes the concept of elementary volume and Saint-Venant's deformation compatibility condition used in continuum mechanics problematic.

这种情况使连续介质力学中使用的基本体元的概念及圣维南变形协调条件受到了置疑。

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Now this is what you learn in elementary physics and in mechanics, right.

这就是我们从基础物理,和力学中学到的。

麻省理工公开课 - 热力学与动力学课程节选