• So if we want to talk about the volume of that, we just talk about the surface area, which is 4 pi r squared, and we multiply that by the thickness d r.

    如果我们要讨论它的体积,我们要用的是表面面积,也就是4πr的平方,乘以厚度dr

    麻省理工公开课 - 化学原理课程节选

  • This would be an average adult male, 30 years old, the average height and weight, and surface area and temperature, and lots of characteristics of an average person.

    包括普通成年男性,三十岁,平均身高和体重,平均表面积和体温,还有许多其他数据

    耶鲁公开课 - 生物医学工程探索课程节选

  • That is the lowest point on the earth's land surface so this dramatic drop in just a very short geographical area.

    这是地球陆地表面的最低点,这急剧下降是在很短的地理范围内。

    耶鲁公开课 - 旧约导论课程节选

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