Socializing was already stratified by our various postal codes; now friendship groups self-edited even further.

社交活动已经被我们不同的邮编分成了不同的等级；现在的友谊发生了改变。

Parts of the Arctic seem to be getting badly stratified.

北极部分地区的分层现象正越来越严重。

The more stratified water is, the less nutrients in it move around.

海水分层程度越高，那么它的营养成分流动得就越少。

The first type of epithelium is called keratinized stratified squamous epithelium.

第一种叫角化复层鳞状。

Squamous cell carcinoma arises from the stratified squamous epithelium.

食管鳞起源于复层鳞状。

But in summer, the northern part of the Barents Sea is even more stratified than the tropical Atlantic and Pacific.

在夏天，巴伦支海的北部比大西洋和太平洋热带区域的分层程度还严重。

At that time, Mexico had been a Spanish colony for over a century, leading to a complex and stratified class system.

当时，墨西哥成为西班牙的殖民地已有一个多世纪了，导致了复杂而分层的阶级制度。

So its mucosa is made up of stratified squamous epithelium, which is better equipped to resist abrasion from food going down.

因此，其粘膜由复层鳞状构成的，能较好地抵御食物对食管的磨损。

Most of the oral cavity is lined by stratified squamous epithelium, so the majority of cancers that arise are squamous cell cancers.

口腔内大部分表面都由复层鳞状覆盖，所以大部分口腔都属于鳞状细胞。

A second type of epithelium is non-keratinized stratified squamous epithelium, and it contains cells that don’t produce much keratin, making this layer less tough.

第二种未角化的复层鳞状，其细胞产生的角质较少，故这层结构相对比较脆弱。

Histologically, it’s a pretty complex tumor with lots of prominent features including multiple cysts filled with a thick “motor-oil”-looking fluid; and cells that stratify, or arrange themselves in layers.

组织学方面，颅咽管瘤许多明显特征混合的肿瘤，包括充满浓稠“汽油”样液体的多发囊肿以及细胞分层（呈层状分布）。

All right, as a quick recap, oral cancer refers to cancers that originate in the oral cavity, which is lined by keratinized or non-keratinized stratified squamous epithelia.

得！快速回顾一下：口腔指起源于口腔的症；口腔由角化或未角化的复层鳞状覆盖。

The mucosa also has three layers of its own: a layer made of stratified squamous epithelium; a layer of connective tissue, called the lamina propria; and a layer of muscle cells, called the muscularis mucosae.

黏膜层本身又由三层结构组成，一层复层鳞状，一层结缔组织，又叫固有层，还有一层肌细胞，又叫黏膜肌层。

The oral surfaces covered by non-keratinized stratified squamous epithelium include the buccal mucosa, the floor of the mouth, the lateral and ventral (or bottom) surfaces of the tongue, the soft palate, and the retromolar trigone.

口腔表面由未角化的复层鳞状覆盖的结构，包括颊黏膜、口底、舌的侧面和腹侧（或底面）、软腭与磨牙后三角。