使维持

The valve core dynamic fixed flow balancing valves is compossed of pistons with changeable flow area,hi-presision(±5%)springs and sustaining devices. Affected by differential pressure and springs,the flow nipple will do piston movement.During the movement,the fliw area changes and the flow rate sustains at a constant value.

动态流量平衡阀的阀芯是由可变过流面积的阀胆和高精度（±5%）弹簧及支撑装置组成，受压差和弹簧的作用，阀胆的节流嘴可在阀胆罩内做活塞式往复运动，运动过程中流通面积发生改变，从而使流量维持在恒定值。

Air for combustion is drawn into the battery heating system,where it is heated by passing through flues in which gas was earlier burnt, then the preheated air is introduced into individual heating flues to support combustion of gas provided through jets.

燃烧所需的空气被引入焦化设备的加热系统，并使其通过其中已有燃烧着的煤气的烟道而被加热。然后，预热过的空气被导入各个加热烟道以维持由入口喷出的煤气的燃烧。

Specifically, the commodity economy began to recover in 1979-1989, mainly in rural and township enterprises have made considerable development, coupled with the maintenance of the planned economy era is basically the full low-protection and relief, the liberation of the human rights of some to make it similar to the Freedmen At this time despite the relatively small market, but the community as a whole have more vitality, and its achievements with the decade 1927-1937 compared to the Republic of China.

具体地说，1979-1989年开始恢复商品经济，主要是农村和乡镇企业有了较大的发展，加上基本上维持计划时代的全面低保障和救济，又解放了部分人的人权，使之类似自由民，这个时候尽管市场比较小，但是整个社会比较有活力，其成就可与1927-1937年中华民国黄金十年相比。

Gelatin microsphere is firstly made by encapsulating bFGF into gelatin by special manufacture process, then this microsphere was combinated into PLGA conduit or PLGA film.when used, we need only pack the injury peripheral nerve, injury spinal cord, wounded pars encephalic with the PLGA conduit. The conduit or film can slowly release buff which would be absorbed by around tissues.bFGF was already proved to be nutritious to the regeneration and alive of neuron and protect injury neuron.bFGF can also promote morphogenesia and division of nerve cell which would raise the survival rate of neuron, guide the generation of axon etc.bFGF is one of the important factors of sustaining the normal survival of cholinergic nerve.

使用时，只需将此材料贴敷外周损伤神经伤患处，脊髓伤口，或在脑部开颅手术后填充于术后创面，可有效地在伤口局部缓慢地释放并由机体组织吸收bFGF等神经营养因子。bFGF等已被证明具有神经营养作用，可促进神经元的再生与存活，保护受损的神经元。bFGF等对神经细胞兼有促进形态发生与分裂作用，具有提高神经元的成活率、诱导轴突向外生长等功能，是维持前脑基底部胆碱能神经元正常生存的重要因素。

Hand labor to machine farming, and from subsistence to commercial

农业的革命——和战后制造业的革命并驾齐驱——使手工业劳动变为机械耕作，从维持生计的农业变成为商业化的农业。

In order to survive and develop,church female university fully dig their resouces and advantages to form their own educational characteristics and get a firm foothold in higher education.After the liberation of the mainland,Jinling Women's University,together with other christian university,accepts and harmonises the new norms and requirements which the new regime ask the college to follow and try to continue their school.Around 1951,the most Christian universities become pubilc universities after amalgamation and adjustment.The 1920s nationalism tide and other challenges and impacts come from the Chinese' government and society not only did not hurt the christian university's vitality seriously,instead they promoted the christian university's self-adjustment and innovation,simultaneously it impelled the church female university to become an important element of the modern Chinese female higher education and made great unique contribution.

大陆解放后，金陵女大和其他教会大学一道，接受新政权对于大学教育的统一规范和要求，并努力进行调适和顺应，力图继续办学。1951年前后，绝大多数教会大学先后经历合并和调整，改为公立大学。20年代民族主义浪潮和来自中国政府、社会的其他挑战和冲击，不仅没有严重损伤教会大学的元气，反而促进了教会大学的自我调适与革新，使教会女大自身得以进一步维持和发展，同时也由此推动了教会女大作为中国现代女子高等教育的重要一员，做出独特贡献。

According to a good breeding project, inbreeding can be avoided and gene exchange can be increased. That means genetic diversity in crested ibises can be sustained, and on the base the populations adaptive capacity and evolutionary potential should be promoted. In this way,the rare bird will be protected more successfully.

根据谱系而在繁殖酉己付时尽可能地避免近交，将增进个体间的基因交流，使种群的遗传多样性得以维持，并有可能提高其生存能力与进化潜力，最终达到更好地保护这一稀世珍禽的目的。

Cole (1989) has found that Japanese perceive they have lost face when they are not able to maintain ingroup harmony such as when they shame or disgrace a friend or coworker.

Cole（1989年）发现日本人认为当他们不能维持内部和谐时他们会丢脸，例如当他们使朋友或同事蒙羞或丢脸时。

The shockwave of the meteorite strike on the terrane of the surface passes the dynamic energy to the surface and forms the target terrane shatter cone; due to the fact that the terrane of stricken surface can not maintain the state of stress, a cluster of rarefaction wave was formed behind the shockwave to decompress terrane substances from high pressure state, this cluster of rarefaction wave ejects with high speed from the interface between the substances such as meteorite, surface terrane and lava, the shockwave compresses the target terrane substances, generating super-high temperature and forming a jet current of rock mass, rock powder, lava or rock fog with high pressure and temperature, the jet current lasted until the shockwave rebounded from the backside of rock, and the target of meteorite-stricken surface is formed on surface.

陨石撞击地面岩层时的冲击波把动能传给地表产生靶岩震裂锥，由于被撞击地表岩层不能维持应力状态，冲击波后面就发展一簇稀疏波使岩层物质从高压状态下减压，在陨石、地表岩层、熔岩等物质交界处高速喷出，冲击波压缩靶点岩层物质产生超高温，成为压力大温度高的岩块、岩粉、熔岩或岩雾喷射流，直到冲击波从岩石背侧反射、地面上形成陨击靶点。

Alexander Smollett, master; David Livesey, ship's doctor; Abraham Gray, carpenter's mate; John Trelawney, owner; John Hunter and Richard Joyce, owner's servant, landsmen - being all that is left faithful of the ship's company - with stores for ten days at short rations, came ashore this day, and flew British colours on the log-house in Treasure Island.

亚历山大·斯莫列特，船长；大卫·利弗西，随船医生；亚伯拉罕·葛雷，木匠助手；约翰·特里罗尼，船主；约翰·亨特和理查·乔埃斯，船主的仆人，未出过海的新手--以上是船上剩下的全体忠实的船员--今天带着短缺的、仅够维持十天的口粮上岸，并使英国国旗在宝岛的木屋上空飘扬了起来。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷