以其

Compared with classical cytotoxic T lymphocytes , NK cells are superior in the following aspects: NK cells are among the first cell types to be activated after intracellular pathogen stimuli, the activity of NK cells peaked between 1 to 3 days, retained during the first 7-10 days, and the T cells response emerged only after 7 days when the NK cell responses begin to decline; though comprising of only 10％-15％ of peripheral lymphocytes, NK cells mobilize most of the cell populations in a strong and high level response to different invasions, and act as key factors at early defense before a specific immune response could mount, while only certain clones were involved in T cell response; NK cells kill virus-infected or malignant transformed cells without pre-sensitization and without restriction by major histocompatibility antigen, which is usually a mechanism of immune escape to T cell recognition by virus-infected or tumor cells, thus NK cell in complementary with T cells play crucial roles in tumor and virus eradication.

NK细胞以其强大的细胞毒活性为特征，与细胞毒性T细胞相比，NK细胞具有如下特点：NK细胞虽然只占外周血淋巴细胞的10-15％，但是对刺激性因素产生应答的过程十分迅速，一次可以调动大多数细胞共同参与，而不是几个克隆的活化，免疫应答的强度高；病毒感染或恶性转化细胞的一个主要特征是细胞表达的MHCⅠ类分子下降或消失，并借助这一机制逃避特异性T细胞应答的识别，NK细胞介导的杀伤活性无需抗原刺激，不受MHCⅠ分子表达的限制，从而与T细胞应答互为补充发挥免疫防御的功能；NK细胞的免疫活性可以被多种细胞因子上调，其中IFNα，IL-2，IL-12，IL-15和IL-18具备更强的作用；NK细胞具有强大的细胞因子分泌功能，对于启动T细胞特异性应答必不可少。

The essayist, then, is in his particular fashion an interpreter of life, a critic of life.

因此，随笔作家以其特殊的方式充当了人生的解说员，人生的评论家。

With its anthropological approach to discourse analysis,the ethnography of speaking has exerted great influence on contemporary linguistics.

言语民俗学以其人类学视角的话语分析对当代语言学产生了广泛而深刻的影响。

The song is different from the general technical training, etude, while the the music is in their clear-cut image, giving Etudes have a profound ideological content and high artistic temperament.

该曲不同于一般技术训练的练习曲，而是以其鲜明的音乐形象使练习曲具有深刻的思想内容和高度的艺术气质。

Then,by means of probability theory and event tree analysis,the fire growing probability and critical time for each phase were calculated,and the average burned area of ship was estimated.

根据不同阶段火灾的特点，求得了各阶段火灾的临界时间，并以其为基础对火灾发生后船舶舱室平均过火面积进行了估计。

Twentieth century, with the rapid development of the world automobile industry, automotive market prospects after a huge, everlast company decided to divest its existing main business focus on energy-saving auto after-market product development and maintenance services to the most advanced research results: Fuel reinforcing agents, saving energy and reducing friction agent, boric acid ester, organic molybdenum, tungsten, boron products, first applied to the oil gas, diesel additives and car care and maintenance in the field, specifically for the automotive service chain to provide OEM service and technical support Europe and the United States as a world-renowned conservation renowned chain Midas, Firth pass, lead-free round and so on and Everlast company has a good working relationship, enjoys a high reputation.

2002年进入中国，安能公司先后为多家汽车生产厂及汽车护理连锁服务机构提供OEM服务和技术支持，如车爵士、美达等中国品牌，在此期间，安能公司努力适应中国市场情况和实际需求，创新了一套适合中国国情的运营模式。2010年，安能公司斥资千万在中国北京中关村科技园区及上海建立了汽车护理品两个专业研发基地，同时注资北京市级油品应用技术研究所，共同打造具有世界先进水平的汽车护理品研发基地。并顺利开工建设在北京顺义的生产基地，安能以其强大的技术优势和科研优势奠定了发展中国市场的坚实基础。

They are identified by an exclamation point !

在"数据库"窗口中，是以其名称后紧跟感叹号！

This system uses the abundant expert knowledge combining the reasoning abilities of Reasoning Machine and Expositor to simulate the decision process of human experts and solve complicated problems in relative fields.

近年来，专家系统以其特有的优势被广泛应用于各个领域。专家系统利用知识库中包含丰富的专家知识，结合推理机、解释器的推理能力，模拟人类专家的决策过程，解决相关领域内的复杂问题。

In many modem designfields, display design shows a special mien by its synthesis and extensity.

在众多现代设计领域中，展示设计以其综合性、广泛性和社会性呈现出独特风采。

during the exterior intercourse of the united states in the period of the cold war,culturediplomacy played the role of exteriorly infiltrating through culture with its highly "peaceful".

在冷战时期的美国对外交往中，文化外交以其高度的"和平性"，起着对外文化渗透的作用。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。