螺旋

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。

Large spiral galax ies like the Milky Way seem to have two or three per century.

大型螺旋星系例如银河系似乎每世纪产生三两个。

Objective To explore the value of helical CT scan in the diagnosis of gall bladder carcinoma.

目的 探讨螺旋CT多期增强扫描在胆囊癌诊断中的作用。

Results The spiral ganglion cells of the human temporal bone decreased with the increase of age.

目的 观察不同年龄组人的螺旋神经节细胞形态变化，进行定量研究。

Objective To study the effects of gantry rotation time on image quality in 64 - slice spiral CT.

目的研究不同机架旋转时间对64层螺旋CT图像质量的影响。

Objective: To investigate relationship between density of Helicobacter pylori and grading of gastritis.

目的：研究幽门螺旋杆菌感染的细菌密度与不同程度慢性胃炎的关系。

In fact, the mean curvature and Gauss curvature of any helicoidal surface are independent on rotation parameter.

事实上，三维Minkowski空间中任意螺旋面的平均曲率和Gauss曲率都与旋转参数无关。

Thus, combining this work with Benekis work, we prove that there exist any type of helicoidal surface with mean curvature or Gauss curvature being any smooth function.

这样结合Beneki等人的工作，本文证明：三维Minkowski空间中，平均曲率或Gauss曲率为任意给定光滑函数的任意一类螺旋面都是存在的，并给出了具体的参数表达式。

By using the profile modeling machining equipment of helix angle, a new method about grinding rake face of gear cutter hob on tool grinder is presented.

提出一种用螺旋角仿形加工装置在工具磨床上刃磨齿轮滚刀前刀面的方法。

A cutting tooth equipment is added in on general NC milling machine, machined screw bevel wheel is linked to dividing head, gearwheel is install on chuck, then, NC machining of screw bevel wheel can be realized with sequential evolutional method.

在普通数控铣上增加一铣齿装置，把被加工螺旋锥齿轮与分度头相连，大齿轮直接装在卡盘上，采用连续展成法实现其加工。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了