Any harmful microbes that make it into the epidermis will encounter Langerhans cells.

若有害微生物得以侵入，就会遇到郎格汉斯细胞。

As new cells form at the base of the epidermis, older ones are pushed up.

随着新细胞在底部形成，旧细胞会被推出。

It's supposed to be good for your epidermis.

你的皮肤有好处。

The epidermis is supported by the dermis, which is where you'll find nerve endings, sweat glands, hair follicles, and connective tissue.

表皮由皮层支撑，在皮层中有神经末梢、汗腺、毛囊和结缔组织。

But many dermatologists think that most of these anti-aging peptides are just too large to squeeze in between cells in the epidermis.

但很多皮肤医生还是认为这些抗老肽实在太大，很难把它们挤到皮层的细胞间。

The giant, never-ending task of producing this armor is carried out by an equally giant and never-ending army of skin cells in the underlying epidermis.

生产这种盔甲的巨大的、永无止境的任务，是由表皮下同样巨大的、永无止境的皮肤细胞大军来完成的。

Your skin is like a layer cake, and the icing on that cake is a thin layer of cells called the epidermis.

你的皮肤就多层蛋糕，表皮细胞就蛋糕上的糖霜。

The needles punch through the epidermis, allowing ink to seep deep into the dermis, which is composed of collagen fibers, nerves, glands, blood vessels and more.

针刺透表皮让颜料深入皮，皮之下是胶原纤维、神经、腺体、血管等等。

Made up of three layers, the epidermis, dermis, and hypodermis, skin's thickness varies from 0.5 millimeters at its thinnest and up to four millimeters at its thickest.

表皮层，皮层和皮下组织。皮肤最薄处为0.5mm，最厚处为4mm。

UVB light is higher energy and can cause sunburns while UVA penetrates deeper under the skin and can damage skin cells along the bottom layer of your epidermis.

中波紫外线能量较高，会造成晒伤。而长波紫外线可以穿入皮肤内部，破坏表皮层底部的皮肤细胞。

Today, a laser is used to penetrate the epidermis and blast apart underlying pigment colors of various wavelengths, black being the easiest to target.

今天，可以用激光来穿透表皮分解掉隐藏在内部的、具有不同波长的颜料颗粒，黑色最容易被分解。

Initially, ink is deposited into the epidermis as well, but as the skin heals, the damaged epidermal cells are shed and replaced by new, dye-free cells with the topmost layer peeling off like heeling sunburn.

其实，纹身的过程也会把颜料植入表皮，但是随着皮肤的自我修复，损坏的表皮细胞脱落被新的、没有颜料的细胞所替代，如同表层皮肤被阳光灼伤样脱落。

Every second, some 500 new cells split off from stem cells at the base of the epidermis and join this army, gradually migrating to the surface of your skin as younger cells form beneath and push them upwards.

每秒钟，约有500个新细胞从表皮底部的干细胞中分裂出来，加入这个大军，随着下面年轻细胞的形成，逐渐迁移到你的皮肤表面，并将它们向上推。

That proboscis though keeps going into the dermis, since the epidermis just gets oxygen from the air and doesn’t have its own blood supply, whereas the dermis does, and this is what our mosquito’s after, right, the blood meal.

但蚊子的喙直刺入皮，因为表皮只是从空气中获取氧气，不皮有血液供；这就是蚊子的目标：血液大餐。

When Aedes aegypti or Aedes albopictus, both species of Aedes mosquito, lands on your skin and sticks in it’s long nose—or proboscis, it pierces the epidermis which is the topmost layer, composed almost entirely of keratinocytes.

当伊蚊属的埃及伊蚊或白纹伊蚊落在你的皮肤上并刺入她的长鼻子——或者说喙时，它会刺穿最上层的表皮；层几乎完全由角质形成细胞组成。