external surface

基本解释

External thread : Threads on an external surface.
外螺纹在外表面上形成的螺纹。
What’s so great about the dome is that it does exactly what Bucky wanted; that is, it has the highest ratio of enclosed area to external surface.
圆屋顶额伟大之处在于它封闭区到外部表面的比例最高，那正是巴基想要的效果。
What’s so great about the dome is that it does exactly what Bucky wanted; that is, it has the highest ratio of enclosed area to external surface.
圆屋顶额伟大之处在于它封闭区到外部表面的比例最高，那正是巴基想要的效果。

With branding all around the external surface of the stadium (including a Mercedez-Benz logo on its roof) and CBS commentators continually referencing the stadium, on air, by its official name, Mercedez-Benz will be heard and seen many times throughout the night.
FORBES: Value Of Super Bowl Branding In And Around The Mercedes-Benz Superdome
Or they can transport heat from an external source of power and manipulate it to cool a surface.
FORBES: The Trillion Mile-Per-Gallon Engine
Of course, Surface Pro has a USB 3.0 port for connectivity with almost limitless storage options, including external hard drives and USB flash drives.
ENGADGET: 128GB Surface Pro ships with 83GB free, 64GB has only 23GB