inner surface

基本解释

Above: Salivary lips showing parallel ridges of inner surface of lower lip, last larval instar of Osmia chalybea.
上图：壁蜂老熟幼虫下唇内表面的平行纹
Cool Earth’s insight was that if you coat only one half of a balloon, leaving the other transparent, the inner surface of the coated half will act as a concave mirror.
Cool Earth的想法是如果你只镀半个气球，另一半是透明的，镀层内表面的那半起凹透镜的作用。
When the light inside the sphere reflected off its inner surface, some was also transmitted through the glass, creating a glowing ring on the outside surface (see image).
当光在球体内部被玻璃球的内表面所反射时，一些光线也通过玻璃球传送，由此创造出一个发光的外表面环（见图片）。

Cool Earth's insight was that if you coat only one half of a balloon, leaving the other transparent, the inner surface of the coated half will act as a concave mirror.
ECONOMIST: Monitor
She portrays an actress who is not immune to self-mythologizing, and who, in the process, bravely reveals that her inner secrets are no different from her surface.
NEWYORKER: Double-Talk