Something unusual, however, occurs when you reach the outermost layer.

然而，当你到达最外层时，不寻常的事情就发生了。

And finally, the outermost layer of your blood vessels is the tunica externa.

最后，你的血管的最外层是外膜。

The motor cortex is a part of the brain's outermost layer, the cerebral cortex.

运动皮质是大脑最外层——大脑皮层的一部分。

The outermost layer is either the adventitia, a thick fibrous connective tissue, or the serosa, a slippery serous membrane.

消化道的外膜，既有结缔组织构成的纤维膜，也有光滑、分泌浆液的浆膜。

Those cells then grew in number to form organoids that resemble the cerebral cortex, the human brain's outermost layer.

之后这些细胞数量不断增加，从而形成类似于大脑皮层的类器官，大脑皮层是人类大脑的最外层。

The simple answer is that tattooing involves getting pigment deeper into the skin than the outermost layer that gets shed.

简单的回答是，纹身的过程是把颜料植入外层可以脱落的皮肤之下。

Earth owes its youthful appearance to the fact that its outermost layer is constantly renewing itself — hiding its age.

地球之所以年轻，是因为它的最外层在不断地自我更新——掩盖它的年龄。

At seven million to ten million kilometers above the sun's surface, we reach the corona, the outermost layer of the sun.

在太阳表面 700 万至 1000 万公里的上方，我们会到达日冕，也就是太阳的最外层。

The pigment is produced by special cells called melanisites, which are present in the outermost layer of the skin, called the epidermis.

这种色素是由称为黑石的特殊细胞产生的，这种细胞存在于皮肤的最外层，称为表皮。

The term " bark" is usually associated with a tree – the outermost layer of a tree.

术语“树皮”通常与树有关——树的最外层。

The proteins on the outermost layer are highly versatile, capable of changing shape and binding to different types of cells within a host.

最外层的蛋白质" 变化多端" ，它能够改变形状以黏附在宿主内部不同类型的细胞上。

The outermost layer of fish and amphibian eggs is a thin membrane that doesn't retain water very well.

鱼和两栖动物卵的最外层是一层薄膜，不能很好地保水。

The outermost layer of your skin consists of about 15 sheets of this scaly mesh — overall, as thick as a piece of plastic wrap.

你的皮肤最外层由大约 15 张这种鳞片网状物组成——总体来说，有一块塑料薄膜那么厚。

The gene, dubbed SELF-1, is expressed in the outermost layer of the nematode's skin–right where it needs to be for tactile sensing.

该基因被称为 SELF-1，在线虫皮肤的最外层表达——恰好是触觉感知所需的位置。

(male professor) OK, let's get back to the Sun, this time looking at the outermost layer of the Sun's atmosphere, the corona.

（男教授）好吧，让我们回到太阳，这次是看太阳大气层的最外层，即日冕。

The outermost layer of the mucosa is the muscularis mucosa or muscularis interna, and it's a layer of smooth muscle that contracts and helps break down food.

粘膜层的最外层为粘膜肌层，也可称为内肌层；它由一层平滑肌构成，可帮助碾碎食物。

Paper cuts directly damage the nociceptors in your outermost layer of skin, the epidermis, and those nerve bundles send pain signals to your brain.

剪纸会直接损伤皮肤最外层（表皮）中的伤害感受器，这些神经束会向大脑发送疼痛信号。

Working with neurosurgeons, the Institute acquired healthy cells from the cortex —the outermost layer of the brain— from patients undergoing surgery for epilepsy or brain tumors.

该研究所与神经外科医生合作，从接受癫痫或脑肿瘤手术的患者的大脑皮层（大脑的最外层）中获取健康细胞。

Their epidermis, or outermost layer of tissue, produces billions of tiny hairs that absorb water and nutrients, and their vascular tissue transports the nutrients up to the stem and leaves.

它们的表皮，或最外层的组织，产生了数十亿根微小的毛发，这些毛发吸收水分和营养，它们的维管组织将营养物质运送到茎和叶。

That's the outermost layer of transparent tissue that helps focus light entering your eye and protects everything else from things like dust, germs and UV radiation.

这是透明组织的最外层，有助于聚焦进入眼睛的光线，并保护其他一切免受灰尘、细菌和紫外线辐射等物质的侵害。