占主要地位

The article in recent years the research progress of disease of oral cavity of TP prevention and cure makes one overview. The compositive TP of the basic research 1.1 TP of 1 TP is the floorboard that phenolic apperception of a kind of many hydroxyl closes matter, 25% what hold tea dry weight about, its are main component includes to express gallnut of gallnut catechu element gallnut of element of catechu of gallnut of acerbity ester, watch, watch catechu element is acerbity element of catechu of ester, watch, express gallnut of gallnut catechu element among them acerbity ester content is highest, occupy the 80%[1] of catechu element about, fighting oxidation with its unique element structure, fight the position with fight the respect such as tumor to have choppy, significant. The 1.2 TP absorption in oral cavity and metabolization Lee [2] is measured normally inside a hour after healthy person is chewing green tea Xie Huo contains juice of gargle green tea, content of the TP in saliva is very high, after observing green tea passes salivary enzymatic hydrolyze, TP is slow release and in oral cavity;Yang of local play action [the salivary level after 3] checked 6 volunteers to drink tea, chroma of the TP in making clear the saliva after drinking tea as a result is serous TP pH indicator 2 times, and the salivary TP concentration that contains gargle tea solution a few minutes to be able to produce higher level, and TP can be absorbed through oral cavity mucous membrane.

本文就近年来TP防治口腔疾病的探究进展作一综述。1 TP的基础探究1.1 TP的组成TP是一类多羟基酚类化合物的总称，约占茶叶干重的25%，其主要成份包括表没食子儿茶素没食子酸酯、表没食子儿茶素、表儿茶素没食子酸酯、表儿茶素等，其中表没食子儿茶素没食子酸酯含量最高，约占儿茶素的80%[1]，并以其独特的分子结构在抗氧化、抗突变、抗肿瘤等方面占有重要的地位。1.2 TP在口腔中的吸收和代谢Lee等[2]测得正常健康人在咀嚼绿茶叶或含漱绿茶液后的一个小时内，唾液中TP含量很高，并观察到绿茶通过唾液酶水解后，TP缓慢释放并在口腔局部发挥功能；Yang等[3]检查了6位志愿者饮茶后的唾液水平，结果表明饮茶后唾液中TP浓度是血浆TP浓度的2倍，而含漱茶溶液几分钟即可产生更高水平的唾液TP浓度，且TP可通过口腔黏膜吸收。

Data collected by surveys on commercial fisheries and field sampling in different stages showed that the assemblages have been dominated by lentic species in stead of lotic species after the impoundment of the Ertan Reservoir.

结果表明水库建成后不同区段的鱼类种类结构发生了变化，喜栖静水和缓流环境的种类逐渐在库区占主导地位，适应急流环境的种类主要分布于库尾和支流等局部水域中，一些外来种已经定居并在某些水域形成了优势种群。

If there is a difference, as the degree is different, the difference's influence on IC has 3 situations: neglectable, slightly important, very important.

若有差别，由于差别大小不同，它们在两种文化整体差异中所占的地位就不同，可以呈现出三种主要情况：不重要的，比较重要的，非常重要的。

The results indicate that the high efficiency and stable performance of shortcut nitrogen removal in MBR-PBBR process is attributed to the predominance of functional microbiology Nitrosomonas eutropha during the period of operation,which occupies over 54%of total bacteria.However,large amount of organic carbon can destroy the predominance of N.eutropha,whose proportion decreased to 31%at TOC/N=0.3.The diversity of microbial community in MBR increases along with operating time.

结果发现，生物强化的MBR-PBBR工艺能实现相对稳定和高效的捷径生物脱氮，主要归功于MBR中的功能微生物Nitrosomonas eutropha在运行过程中始终保持优势地位，占全菌数的比例大于54%；然而，当外加有机碳源较高(TOC/N≥0.2)时，可动摇氨氧化菌的优势地位，N.europha占全菌数的比例在TOC/N=0.3时下降至31%。

The Ti_3SiC_2-SiC multiphase ceramic were fabricated by in situ synthesis under hot isostatic pressing.The examinations indicate that,the dominant wear mechanisms change with load increasing under unlubricated conditions,it is main abrasive wear under low load,and it is main adhesion wear under high load.Lubricating oil improves the friction coefficient and wear rate of Ti_3Si...

结果表明：干摩擦条件下随载荷的变化，占主导地位的磨损机制将发生变化，在低载荷下以磨粒磨损为主，高载荷下以粘着磨损为主；同干摩擦相比，润滑油对摩擦副的摩擦磨损性能的改善均很显著；Ti3SiC2/SiC复相陶瓷的磨损主要由粘着和微断裂引起的。

In class-divided society, it is the economically dominant class—that group in society which monopolizes ownership and control of the major means of production technology, land and raw materials, etc.

在阶级分化的社会，是经济上占主导地位的阶级垄断和控制了主要的生产资料，它们同时也统治了政治和思想的上层建筑。

Chinese-made refinishing coating has obvious advantage, the quality is close to imported products, but the price is only 60 percent of those imported ones. So the leading position of Chinese-made refinishing paint is more and more obvious, the existed problem is market disruption. Because there are up to a huandred brands and most of them are private enterprises.

国产的修补漆优势明显，品质上接近进口产品，价格只有进口修补漆的60%，国产修补漆在国内的汽车市场上越来越占主导地位，存在的主要问题是市场乱，品牌有上百个，多数是民营企业。

Oil and gas exploration wells concentrate in the rifted basins with high hydrocarbon enrichment and large area in east China. They are mainly distributed in the medium-deep strata of Paleogene, and nonstructural traps take the dominant.

中国东部油气探井主要分布在资源丰度高、面积大的断陷盆地中，层系上以古近系为主，深度上以中深层为主，油藏类型上非构造圈闭已占主导地位。

In order to improve drilling efficiency, scientific researchers in the world make much study on the structure parameters and geometry shape of drill point.

钻头是孔加工的主要刀具，在机械制造业中占重要地位，传统的麻花钻在生产上被广泛使用。

The effects of different pore diameter packings on proteins＇separation are discussed.

在HDSI-100上，主要以反相色谱机理为主；在HDSI-300上，排阻作用占主导地位。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。