| 1. | Planetary nebulae are a type of isolated gaseous nebulae possessing a fair degree of bilateral symmetry .
行星状星云是一类孤立的气体星云，具有相当程度的双侧对称性。 |
| 2. | Bilateral symmetry , for example , is almost universal among animals
举例来说左右对称就几乎普遍地存在动物世界。 |
| 3. | Finally , a method for measuring the degree of bilateral symmetry in gray - scale images is put forward
文中还提出一种度量灰度图像双边对称性的方法。 |
| 4. | The experiments show that the method can correctly indicate the degree of bilateral symmetry of object in every direction
实验表明，该方法能准确表示图像中物体在各方向上的双边对称性的大小。 |
| 5. | Results : the results of 38 patients in 41 who got the sursical treatments were satisfactory , and the bilateral symmetry was satisfactory
结果41例经手术整复的患者经术后观察表明， 38例骨折复位良好，颌面部两侧对称性良好。 |
| 6. | Moreover , a method of measuring the deg ree of bilateral symmetry in gray - scale images is put forward which makes full use of the intensity values of object
论文首先简单介绍了一些常用的图像对称性检测方法和对称性度量方法，对它们的性能进行了简单的分析和比较。 |
| 7. | As we all know , bilateral symmetry , three - layer embryo , metamerism and having a relatively developed head are the common characteristics of the arthropoda and annelida , so it is believed that arthropod originated from annelid
由于节肢动物具备环节动物两侧对称、三胚层、身体分节、头部较发达等特征，所以一般认为节肢动物起源于环节动物或类似环节动物的祖先。 |
| 8. | For objects with bilateral symmetry , those with one plane of symmetry , such as most animals ( humans included ) and many machines , the above method implies modelling one half of the object , and then mirroring a duplicate of the first half to get the whole object
至于那些镜象对称的模型，他们都有一个对称面，例如大部分的动物（包括人类）和许多机器；以上所述现象，则暗示了只需要制作模型的一半模型，然后镜象复制制作好的一半以得到整个对象。 |
| 9. | As we presented in the paper , with the evolution procedure accomplished of neurons from the single - celled organisms and multicellular animals that lack nervous system , the evolution course of nervous system could be summarized briefly as : chaos phase , equally nerve net , centrilized network phase and bilateral symmetry , hierarchical organization and cephalization phase
研究表明，从原始的单细胞有机体类似神经动作电位的协调功能逐步进化成神经元开始，神经系统大致经历了混沌阶段、平权网络阶段、中心化网络阶段和双侧对称的层次体系结构等进化阶段。 |
| 10. | For bilateral symmetry objects , the techniques on symmetry - point detection and symmetry - axis extraction are presented based on harmonic conjugation relationship . for rotated symmetry objects , the techniques on rotated units description and rotated symmetry center extraction are presented based on center invariants of objects . further more , by using 3d invariants and 2d projective transformation , an approach to recover shape from part symmetry objects is realized on some conditions
( 3 )深入分析了2d对称性目标透视成像的几何特点，将共点四线交比用于目标轮廓上的关键点的特性描述中；利用调和共轭关系，提出了一种针对左右对称型目标的对称点检测和对称轴提取的算法；利用交比关系构造了目标的形心不变量，提出了一种针对旋转对称型目标的旋转对称单元判定、旋转中心提取的算法；进一步利用3d不变量和2d射影变换，实现了一定条件下的对称性目标的形状恢复技术。 |
