中心体

The device includes a drill spigot inserting into the marebase sand layer through the upper cover soil layer, there sets air inlet, sand discharging pipe and vibration connecting pipe in the drill spigot; there sets a sand absorption head on the bottom of the air inlet and sand discharging pipe; the bottom of the vibration connecting pipe connects with the vibration head; the sand absorption head is made up of a centre cavity, ring cavity and sand absorption pipe.

该装置包括一穿透上部覆盖土层插入到海底深埋砂土层的钻孔套管，在钻孔套管内，设有进气管、排砂管和振动连接管；进气管和排砂管的下端连接一个吸砂头；振动连接管的下端连接振动头；吸砂头由一中心腔室、环状腔体和吸砂管构成。

In the Eogene and Neogene, Qaidam Basin experienced the multiphase tectonic movement; the paleoclimate evolved from warm-humid to arid; the water in the basin was gradually salinized; the depocenter migrated from west to east. The master factors and developmental characters of lithologic hydrocarbon reservoirs have their own particularity. Taking the fine exploration zones of the southwest hydrocarbon-rich depression in Qaidam as the key point, with the analysis of source-rock distribution, sedimentary evolution and sedimentary system distribution, the author proposes that the density difference increases after the fluvial water enters, then clam and bar sand bodies are formed easily due to density flow. Highstand system tract and transgressive system tract below the maximum flooding surface are the main exploration areas of lithologic reservoir.

柴达木盆地古近纪－新近纪经历了多期构造运动，古气候由温湿向干旱演变、湖盆逐渐咸化、沉积中心由西向东迁移的演化过程，地层岩性油气藏的主控因素和发育特征有其特殊规律，以柴达木盆地柴西南富油气凹陷精细勘探区带为重点，通过分析烃源岩展布、沉积演化和主要沉积体系展布，提出咸化湖盆在河流入湖后因密度差较大，易形成密度流等成因的各类滩坝砂体，最大湖泛面之下的高位体系域、湖侵体系域是地层岩性油气藏的主要勘探领域。

Based on the theories of multi-body systems, this paper presented the subsystem method for dynamics of a rigid-flexible coupling system and a method for a flexible cantilever beam attached to a moving central rigid-body undergoing an arbitrarily three-dimensional large overall motion .

本文根据多柔体系统动力学理论，创新地提出了子系统的刚柔耦合动力学建模方法和考虑动力刚化效应的中心刚体作任意三维运动梁作三维振动的动力学建模方法。

Dept. of Conservative Dentistry and Endodontics, School of Stomatology, Capital University of Medical Science, Beijing 100050, China

吉林大学口腔医院种植中心，吉林长春 130041；2。首都医科大学口腔医院牙体牙髓病科，北京 100050

In the star of David in which 2 pyramids merge together having 12 inner and outer corners, where the centre as 13 represent the spirit descending merging with the ascending body.

在大卫星里，合在一起的2个金字塔有12个内及外的角，中心13代表灵性降临与开悟体融合一体。

It is proposed that tyrosine residues are involved in the active site of CTA and they are crucial in recognition and binding of ribosomal RNA.

这些结果表明酪氨酸残基可能位于cinnamomin A链的RNA N-糖苷酶活性中心，并且它们在识别和结合核糖体RNA的过程中有重要作用。

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合作伙伴：广州移动、广州联通、广州电信、国美电器、永乐电器、家乐福、王老吉、邓老凉茶、金威啤酒、广州市旅游局、广州蔬菜公园、珠江夜游、大河马游乐园、越秀公园冰雪世界、金海马集团广州公司、金力家具、香江家私、皇庭家具广场、香港皇朝家私、星艺装饰、广东电视台、南方都市报、新快报、中华英才网、晶神化妆品、力美健俱乐部、中体倍力健身、体育中心健美乐俱乐部、《墨功》《黄金甲》、万思顿食品、王老吉凉茶、邓老凉茶、伊利乳业、风行牛奶、培芝牛初乳、宝芝泉羊奶、农夫山泉、金威啤酒、红太阳酒业、刀麦食用油、军区准分子、中医丰胸、远东美容、鱼美人美容、扶元堂康复门诊、武警医院、佐登妮丝美容连锁、顺弛地产、爱浪音响、利星直饮水机、北大青鸟培训、卓越家教、正祥和家政、金宝贝早教、陈李济咳喘顺、太太静心口服液、恒诚制药、&妻之友&女用避孕药、长城汽车、海南马自达、背背佳、奈瑞尔等，客户在继续增加中

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。