for instance, for the thermos with the coffee in if you place the boundary in the inside wall of the glass or the outside wall of the glass and the inside of the thermos, that makes a difference; different heat capacity, etcetera.

比如说，对于装咖啡的热水瓶来说,你把边界设置在瓶胆的内壁上,或者设置在瓶胆外壁上,或设在热水瓶里面，情况都是不一样的;,有不同的热容等等。

麻省理工公开课 - 热力学与动力学课程节选

Not only the IgG but there are special antibodies called secretory IgA and these are highly enriched in mucosal fluids in the mucus lining of your gut, and the eye, and of other--of mucosal organs.

不仅仅是IgG分子,还有一些特殊的抗体,被称作分泌型免疫球蛋白A,IgA在体内粘液中广泛存在,例如,在小肠内壁和眼球周围以及,其他带有粘膜的器官中都有IgA的分布

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