椭圆的

Cacao tree is a kind of small arbor tree and it has the following outstanding features. First, cauliflory: its flowers burst open on the tree trunks directly and then the flowers will produce fruits on the tree trunks too. The cacao flowers are small, but the fruits are big. The fruits are elliptical and have many ridged lines on the outer skins. The color of the fruits is yellow, and each fruit can grow as heavy as one kilogram. Each cacao plant can grow 60 to 70 fruits, and there are about 30 to 50 seeds in each fruit.

可可是一种有趣的梧桐科小乔木，它最大的特点是&老茎生花&和&老茎结果&，花直接开在树干上，果也直接结在树干上，花小而果实大，果子呈椭圆型，表面有一条条棱形线突出，橙黄色，每个果子重达1千克左右，每株可可树可结60-70个果子，一个果子内有30-50粒种子，巧克力的原材料就是这些种子。

A new type of high-birefringence photonic crystal fiber is brought forward, and the method introducing circinal holes with different sizes or elliptical holes which is used to design high-birefringence photonic crystal fiber is replaced by introducing fluorine-doped solid circles.

提出了一种新结构的高双折射光子晶体光纤，通过引入掺氟实心圆的方式形成双折射，而不采用大多数高双折射光子晶体光纤中引入不同孔径空气孔或椭圆空气孔的结构。

The validation for each species crown ratio model indicats that the precision of prognose are all exceed 91%,also pass the Ftest except Betula costata and Acer mono.

各个树种的冠长率模型的检验结果表明，10个树种的预估精度都超过了91%，除了枫桦和色木，都通过了置信椭圆F检验。

In this paper, the host-guest relationship between a general cucurbit [n=7] uril (Q[7]) or a new ellipsoid-host-symmetric tetramethyl-cucurbituril (TMeQ[6]) with hydrochloride salts of 4,4'-dipyridyl (44) or N,N'-dimethyl-4,4'-dipyridyl(dm44) was examined for confirming the interaction between cucurbituril (Q[6]) and these guests.

以七元瓜环(Q[7])和新型椭圆型改性瓜环―对称四甲基取代六元瓜环(TMeQ[6])为主体，4，4'-联吡啶的盐酸盐(44)以及N，N'-二甲基4，4'-联吡啶的盐酸盐(dm44)为客体的主客体相互作用进行了考察。

In addition, the conditions to avoid the loop of P curve are given. The method of obtaining ellipses by decomposing II?

这种椭圆曲线的分解方法为物体的精确描述与几何不变量的计算提供了方便。

Different plant hormones and their different concentration ratios have different effects on the callus of Halenia elliptica D.

结论不同培养条件对椭圆叶花锚愈伤组织的诱导有不同的影响，其中以无菌苗的茎段为外殖体易形成愈伤组织。

Tuber cork deciduous; leaf blade drying blackish, usually ovate or long elliptic-ovate to lanceolate, base cordate to truncate or rounded, rarely sagittate or hastate

块茎木栓层落叶；叶片干燥微黑，通常卵形的或更长椭圆状卵形的到披针形，基部心形到截形或圆形，很少箭头形的或戟形 47 D。

The chaotic attitude motion of an asymmetric satellite moving on a Keplerian orbit in the central gravitational field was discussed. The Hamiltonian function of the system can be expressed by using Serret-Andoyer variables.

基於土星卫星上所观察到的混沌运动，研究了中心引力场中Kepler椭圆轨道上非对称卫星的姿态运动，其系统的Hamilton函数可用Serret-Andoyer变量写出。

Results: The results showed that NOS positive neurons existed in all the auditory afferent nucleus while NOS negative neu-rons existed in the superior olivary nucleus. Most of NOS positive neurons in CNC were located in the posterior ventral cochlear nu-cleus ,which were round or oval bipolar neurons. NOS positive neurons were also found in potine widely.

结果：在脑桥的各级听觉传入核团，均有NOS阳性神经元，而上橄榄复合体无NOS阳性神经元；耳蜗核内NOS阳性神经元，主要集中在后腹侧核，为圆形或椭圆型双极神经元；下丘的臂内侧核NOS阳性神经元呈小的、圆形细胞。

In this article, I present an algorithm based on parallelization.

本文尝试从并行计算的角度来提高椭圆曲线密码算法中数乘运算的效率，并获得初步的成功。

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。