Alright, as a quick recap, the human oral microbiota is represented by the community of microorganisms which are normally found in the oral cavity and can exist as free-floating bacteria, or in the form of a biofilm.

得！快速回顾一下～人类口腔微生物群以口腔内常见微生物群为代表；这些微生物群可以是游菌，也可以以生物膜形式存在。

So it's in our oral cavity, our tongue, and also lots of glands.

它存在于我们口腔、舌头和多腺体中。

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：口腔癌指起源于口腔癌症；口腔由角化或未角化复层鳞状上皮覆盖。

The oral microbiota plays an important role in maintaining oral homeostasis protecting the oral cavity and preventing disease.

口腔微生物群在维持口腔内环境平衡、保护口腔以及预防疾病等方面，发挥着重要作用。

Many carcinogens come into contact with a wide area within the oral cavity and oropharynx, so the idea is that they cause field cancerization.

多致癌物可以广泛接触到口腔和口咽内，故有一个猜想就是这些物质引发区域癌化。

The pizza goes in our oral cavity where we use our teeth to masticate, or chew the food up into small fragments.

披萨进入口腔后，我们用牙齿咀嚼食物，将食物嚼成小块。

These microbes play an important role in maintaining oral homeostasis, protecting the oral cavity, and preventing disease development.

这些微生物在维持口腔内动态平衡、保护口腔与预防疾病等方面起到了重要作用。

The oral cavity and oropharynx are lined by epithelium - and there are a few different types.

口腔和口咽被上皮覆盖，有几类型上皮。

While the prognosis of squamous cell carcinoma in the oral cavity depends largely on the tumor stage, HPV status is a main prognostic factor for squamous cell carcinoma in the oropharynx.

口腔鳞状胞癌预后，很大程度取决于肿瘤分期，而感染HPV状况则是口咽部鳞状胞癌一个主要预后因素。

The major genera with the largest representation in the oral cavities include: streptococcus, prevotella, haemophilus, rothia, veillonella, neisseria, fusobacterium, and porphyromonas.

口腔中微生物主要包括以下几个大属：链球菌属、普氏菌属、嗜血杆菌属、罗氏菌属、韦荣氏球菌属、奈瑟氏菌属、梭杆菌属与卟啉单胞菌属。

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上皮覆盖，所以大部分口腔癌都属于鳞状胞癌。

This alteration can disrupt the bacterial equilibrium in the oral cavity by increasing harmful bacteria and decreasing the beneficial ones, thus leading to a series of oral infectious diseases such as dental caries, or periodontal diseases.

这改变会增加有害菌、减少有益菌，从而破坏口腔中菌平衡，导致龋齿、牙周疾病等一系列口腔感染性疾病发生。

Now the mucosal tissue in the oral cavity can undergo several premalignant pathological changes.

口腔内黏膜组织可经历数癌前病理变化。

Oropharyngeal cancers are strongly associated with infection by human papillomavirus type 16, but interestingly, tumors of the oral cavity, like the lateral tongue and floor of the mouth are not usually associated with HPV 16.

口咽癌与人乳头瘤病毒（HPV）16型感染密切相关，但有趣是，在口腔肿瘤中，像是舌两侧和口底肿瘤则一般与HPV 16没有联系。

So it's absorbed directly across the buccal mucosa, the oral cavity, and it becomes systemic.

因此，它通过颊黏膜和口腔直接吸收，并迅速进入全身循环。

The vowels are shown their relevant positions in a cross-sectional diagram of the oral cavity.

在国际音标表中，语音音段分为辅音和元音两类，将在下节详讨论。辅音又分为肺气流音和非肺气流音：多数辅音是肺气流音，通过从肺部排出气流来完成；非肺气流音包括挤喉音、内爆音和吸气音，吸气音是将空气向口腔内吸入进行发音，内爆音和挤喉音都是紧闭声门，通过对声门和声道前部某一发音部位之间空气控制进行发音。元音相对位置通过一个口腔侧切面图形来表示。

The structures within the oral cavity including the teeth, tongue, and palate, are involved in the chewing (mastication) and swallowing (deglutition) of food.

口腔内结构包括牙齿，舌头和腭，它们对食物咀嚼（粉碎）和吞咽（咽下）起作用。

There most valuable breathing techniques have been identified that improve the redistribution of pressure, with a minimizing effect on the morphological changes in the oral cavity and cephalic extremity, implicitly on the masticatory functional disorders.

已经确定了最有价值呼吸技术，可以改善压力再分配，对口腔和头部肢体形态变化影响最小，隐含地影响咀嚼功能障碍。

Because the volume of your airways and oral cavity and sinuses is probably much different than mine.

因为你呼吸道、口腔和鼻窦体积可能与我差别很大。

Oral cavity: The oral cavity is where the majority of speech sounds are produced.

口腔：口腔是产生大部分语音地方。