螺旋形成

The above results proved that atrazine could be inserted into the double-helix of DNA and formed a stable DNA adduct.

以上实验结果表明，莠去津平面分子能够嵌插到DNA双螺旋链中，形成较稳定的加合物。

Aggregate fruit globose or cylindric; achenes 10 to numerous, spirally attached to elongated receptacle, with 2 hard hollow protuberances at base; style persistent, forming flattened spinelike beak.

聚合果球状的或圆筒状；瘦果10 到许多，螺旋地着生于延长的花托，具2硬中空的突起在基部；花柱宿存，形成扁平具喙。

In the late of April of the second year, male inflorescences unbound and pollinated. When female inflorescences accepted the pollen grains, ovary development was increased in early May. With the development of either of the two ovule, funiculus, integument and nucellus were differentiated. Embryo sac mother cell came into being and the meiosis begins. Then fuctional megaspore developed into matured embryo sac that contain eight nucleuses. In the end of May, double fertilization generated.

次年，4月下旬，雄花序解螺旋散粉，雌花序开花授粉；5月上旬，雌花序授粉后，迅速增长，子房膨大，两个胚珠分化出珠柄、珠被和珠心，珠心中产生孢原细胞；5月中下旬，大孢子母细胞形成并减数分裂，功能性大孢子形成成熟的八核胚囊；5月底，发生双受精。

Lawrence martyr , 10 august : the monthly recurrence known as the new moon with the old moon in her arms : the posited influence of celestial on human bodies : the appearance of a star 1st magnitude of exceeding brilliancy dominating by night and day a new luminous sun generated by the collision and amalgamation in incandescence of two nonluminous exsuns about the period of the birth of william shakespeare over delta in the recumbent neversetting constellation of cassiopeia and of a star 2nd magnitude of similar origin but lesser brilliancy which had appeared in and disappeared from the constellation of the corona septentrionalis about the period of the birth of leopold bloom and of other stars of presumably similar origin which had effectively or presumably appeared in and disappeared from the constellation of andromeda about the period of the birth of stephen dedalus , and in and from the constellation of auriga some years after the birth and death of rudolph bloom , junior , and in and from other constellations some years before or after the birth or death of other persons : the attendant phenomena of eclipses , solar and lunar , from immersion to emersion , abatement of wind , transit of shadow , taciturnity of winged creatures , emergence of nocturnal or crepuscular animals , persistence of infernal light , obscurity of terrestrial waters , pallor of human beings

显示出不同程度之生命力的缤纷色彩白浅黄深红朱红银朱诸星之亮度一直包括到七等星以等级标志的诸星之大小诸星的位置御夫座沃尔辛厄姆路172大卫的战车173土星光环螺旋星云凝固后形成有卫星的恒星群两重大阳相互依存的旋转运动伽利略西蒙马里乌斯174皮亚175勒威耶赫歇耳加勒176等人各自独立地同时所做的发现波得和开普勒所尝试的距离的立方与回转次数的平方的体系化177多毛的众彗星178那几殆无限的被压缩性，以及自近日点至远日点那广漠的远心的重返大气层的椭圆轨道陨石的恒星之起源年纪较轻的天体观测者诞生的那个时期火星上所出现的"暗波"现象179每年在圣劳伦斯节殉教者，八月十日前后降落的陨石雨每月都发生的所谓"新月抱旧月"现象180关于天体对人体的影响的假定威廉莎士比亚出生的时期，在斜倚却永不没落的仙后座那三角形上端，一颗不分昼夜散发着极亮光彩的星辰一等星出现了181这是两个无光死灭了的太阳因相撞并汞合为白热体而形成的灿烂的新太阳大约在利奥波德布卢姆出生时，出现在七星花冠星座里而后又消失了的一颗同一起源亮度却稍逊的星宿二等星182还有约于斯蒂芬迪达勒斯出生时，出现在仙女座中之后又消失，小鲁道尔夫布卢姆出生与夭折数年后出现于御夫座后又消失，以及另外一些人出生或去世前前后后出现在许许多多其他星座中而又消失了的假定是同一起源的实际存在或假定存在的星斗183 。

Firstly, the developing principles of the cylindrical internal helical gear are proposed through analyzing the movement and geometry requirements, which provides continuous contact between the mating gear surfaces. The tooth surface of the internal helical gear in the new gearing can be imagined as being generated by the normal section of the conjugated surface of the ball-tooth, moving along the radial projection of helix line of the tooth-root circle. Also, the proposed surface can be approximate tangent to the conjugated surface of the ball-tooth along a spacial curve.

首先，通过分析保证行星轮作螺环运动时与内斜齿轮实现连续啮合传动的运动和几何条件，提出了圆柱内斜齿轮齿面的两种形成原理：即由球齿运动包络曲面的法截面沿其齿根圆螺旋线在径向的投影进行拓展所形成的内齿面，以及与球齿运动包络曲面呈近似相切接触的等螺距齿面构成的内齿面。

The floral primordium is initially circular, along with the edge of which slight concaves occur. The outmost whorl of tepal primordia arises as a result of apical meristem division and the floral primordium then is in the shape of triangle. Two further whorls of tepal primordia arise in spiral acropetal sequence and are alternately arranged. When the innermost whorl of tepal primordia is at the late developmental stage, the foremost stamen primordia arise almost simultaneously in spiral acropetal succession and all of the stamen primordia are ultimately arranged in a triangle-cone form. Late in stamen primordium development, carpel primordia arise as same as the young stamen primordia and grow laterally. Grooves are present on the adaxial side of each carpel and develop into ventral sutures gradually closing up.

观光木的花原基最初为近圆形，随着顶端分生组织的活动，花原基边缘处出现浅凹，形成第一轮花被片原基，此时，花原基呈三角形排列，后两轮花被片原基依次发生，与前一轮互生；在内轮花被片发生的后期，最初几枚雄蕊原基几乎同时出现，呈螺旋状向顶发生，最后排列成三角圆锥状；雄蕊原基发育后期，心皮原基开始发育，形状与发育初期的雄蕊原基相似，随后心皮原基进行侧向生长，在近轴面出现浅凹，进而发育为凹槽，形成腹缝线，最后腹缝线完全愈合。

The psammoma body mineralization in meningioma is a common type of mineralizationThe analysis of the mineral composition may provide some support information in finding the reason of happening and developing of the diseaseThis paper focuses on the concentric layered structure mineralization in meningiomas, using mineralogical methods, such as HRSEM, ESEM, EDAX, EPMA, HRTEM, XRD and FTIR to systematically investigate the mineral composition, structure and shape of the minerals in psammoma bodies in meningiomasWe have devised a method for preparing the silicon wafer sheet which was used for the ESEM insitu observations and analysisIn this study, we first got the ESEM and HRTEM images of the initial mineralization phase of meningiomasThese images showed that in the early stage of psammoma body mineralization in meningiomas, many mineralized balls composed of octocaphosphate were precipitated on the collagen fibersThese balls continued to grow and aggregate, and were gradually hydrolyzed to become the dahlliteThe continued development of mineralization resulted in the mineralized collagen fibersThe study revealed that the concentric layered structure of the psammoma bodies in meningiomas is formed by the spiral arrangement of the mineralized collagen fibers on which the mineralized grains precipitated.

砂粒体矿化是脑膜瘤中常见的矿化类型，对其形成机理和矿物成分的分析可能会对肿瘤发生、发展的研究提供辅助信息。该研究选取人脑膜瘤中的砂粒体矿化作为研究对象，采用偏光显微镜、环境扫描电镜及能谱、X射线衍射仪、高分辨透射电镜和电子探针对样品的形貌、结构和成分进行测试分析，并以此为依据探讨脑膜瘤中砂粒体的形成机理。研究结果表明矿化的初期为沉淀在胶原纤维上的矿化小球，成分为磷酸八钙；矿化小球不断生长聚集，并逐步水解为碳羟磷灰石晶体，矿化的不断发展致使胶原纤维也发生矿化。砂粒体的同心层状构造是由螺旋状排列的矿化胶原纤维及沉淀在其上的矿化颗粒组成的集合体，而不是多数研究中所述：砂粒体是以坏死细胞残骸为中心由内至外的同心层沉淀。

We find that optical vortices could be efficiently formed and generated due to the interference and superposition effect of all the beamlets, during the propagation process of the coherent radial laser arrays with the initial well-organized phase distributions through the free space, the resulted beam in the far field has the strong rotation effect with the phase helicity.

我们发现具有确定初始相位的、圆径向对称分布的相干激光阵列光束在传播的过程中由于干涉和叠加效应可以形成螺旋形的位相分布且保持光束中心强度为零，即形成光涡旋。

Multiple packed cylinders and more complex structures such as helices or stacked toroids spontaneously form for low-symmetry and high-symmetry cross sections, respectively. Furthermore, the symmetry and domain spacing of these structures can be altered by the shape and size of the confining pore.

我们发现当孔的对称性很低时，共聚物主要形成柱状结构；而当孔的对称性较高时，共聚物形成了多螺旋、层叠圆环等新奇结构。

Hes5 gene, a key downstream mediators of Notch signaling that functions by inhibiting the expression or activity of positively acting bHLH factors, is a member of bHLH transcription factor family which acts as a positive-negative transcriptional regulators which is expressed transiently in different stages in cells growth and differentiation and orchestrate those precisely timed and progressive maturational events underlying cell fate decisions according to orders of time and spatial and coordinated the function of majority of signaling transduction on target genes to influence the proliferation and differentiation.

Hes5是Notch通路转导途径的一个关键的下游信号分子，通过抑制正调控bHLH因子的表达和活性来发挥作用，隶属于碱性螺旋-环区-螺旋转录因子家族。该家族形成一个正负转录调节器，按时空顺序短暂表达于细胞发育分化的不同阶段，介导和协调多种信号系统对大量靶基因的作用，影响细胞增殖、分化。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失