At 13,000 miles down, you'll reach Jupiter's innermost layer.

下降到一万三千英里，你将到达木星最深的一层。

To boot, body heat melts the innermost layer of the walls, strengthening the barrier between you, your airy snow-block insulation, and the frigid great beyond.

人的体热熔化了墙最深处的部分，增强了人、保温层和外边寒冷之间的障碍。

The innermost layer tends to have loosely packed cells that retain their nuclei despite being filled with keratin, a strong protein, creating what's called a " wet keratin" appearance.

最内层往往分布着排列松散的有核细胞，尽管这些细胞充满了高强度的角蛋白，形成一种称为“湿性角化”的外观。

In the gut, there's a layer of smooth muscle just under the submucosa, which sits under the mucosa, which is the innermost layer of the gut nearest to the lumen.

在肠道，黏膜下层之下有一层平滑肌，黏膜下层即位于黏膜层的下层，而黏膜是肠道最内层（离肠腔最近）。

Finally, there's the innermost layer of the heart called the endocardium, which is made of a relatively thin layer of endothelium which is the same layer of cells that line the blood vessels.

最后，心脏的最内层叫心内膜，由一层较薄的内皮细胞构成；与位在血管内壁的是同一层细胞。