多型现象

Access to a large number of Chinese and foreign literatures, this text summarized the life cycle of aphids including anholocyclic type, heteroecious holocyclic type and antoecious holocyclic type, and the important biological characteristics including alternation of generations, difference of hibernation and polymorphism, it offered the theory basic of comprehensive prevention and control.

通过查阅大量的中外文献，对蚜虫生活周期的不全周期生活史、全周期同寄主生活史和全周期异寄主生活史进行了阐述，归纳出蚜虫生活周期中的世代交替、越冬方式的差异、多型现象几个主要生物学特点，为蚜虫的科学控制提供一定的参考价值。

Using the methods of classical shape size measuring and chromosome analysis, we studied the morphological characters and Karyotype of Cobitis sinensis in Xiangjiang River. We also investigated the evolution line and Karyotype polymorphism of the C . sinensis by the methods of cytological classification and cytocatalytic. Our results suggest that the formation of chromosome polymorphism was concerned with heterologous hybridization and some of C . sinensis may perpetuate in a clonal manner by natural gynogenesis.

本文以湘江流域的中华花鳅为研究对象，运用经典的形态测量观察方法、染色体制片技术对中华花鳅的形态生态特征、染色体组型进行了初步研究：运用细胞分类和进化方法对中华花鳅的核型演化和核型多态现象的形成进行了分析，提出：其核型多态的形成牵涉到鳅科鱼类的异源杂交，某些中华花鳅可能是行雌核发育生殖的。

Insect melanism is one of the common polymorphism in nature, and has become classical study system for species evolution and adaptability.

昆虫黑化是自然界中普遍存在的一种多型现象，也成为揭示物种在自然界中进化与适应的经典范例。

However, about 25% of cases exhibit frank malignant features of prominent nuclear pleomorphism, mitotic activity or necrosis.

然而，大约25%的病例显示恶性特征诸如明显核多型现象、核分裂活性或者坏死。

In other areas, sheets of epithelioid cells with prominent nuclear pleomorphism were seen; scattered tumor giant cells and multinucleated tumor cells were also present (Figure 1, B ).

在其他区域，可以见到成片的具有明显多型现象的上皮样细胞；散在的瘤巨细胞和多核瘤细胞也可以见到(图1B)。

The neoplastic epithelial cells within the duct show minimal hyperchromatism and pleomorphism, but they have holes with sharp margins as though punched out by a cookie cutter.

导管内的肿瘤上皮细胞表现为淡染和多型现象，但是他们有边缘锐利的孔像被切饼机切过一样。

Besides, if the karyotype polymorphism in the species of tufted deer is the difference between subspecies or different individual, and the mechanisms of the polymorphism, and so on ,is still cant explan well.

另外，关于毛冠鹿种内核型的多态现象是否是亚种间的差异或者个体差异，以及这种多态现象产生的机制如何等问题仍未能得到很好的解释。

Besides, if the karyotype polymorphism in the species of tufted deer is the difference between subspecies or different individual, and the mechanisms of the polymorphism, and so on ,is still can't explan well.

另外，关于毛冠鹿种内核型的多态现象是否是亚种间的差异或者个体差异，以及这种多态现象产生的机制如何等问题仍未能得到很好的解释。

Body-color polymorphism is common in various groups of insects. It is important for investigating hereditary polymorphism, adaptational mechanism and evolution.

体色多型现象普遍存在于各昆虫类群，体色多型对探讨昆虫遗传多态性、适应机制及生物进化等具有重要的意义。

In these results there are some new findings:(1) when there is not initial geometry defect, multi-waves phenomena still exist and are presented in low orders in vibrative mode shape;(2) of the total vibrative mode shapes of empty tanks there is a type of vibrative mode shapes with the same waves and different directions cos (nθ+φ〓,φ〓≠0 ;(3) the total vibrative mode shape of empty tanks compose of axial symmetry and non-axial symmetry ones corresponding to upright and oblique vibrative mode shape matrices respectively.

最后对空储液罐的特征值问题进行了多达近万自由度的计算分析，得到了一些成果，其中有新的发现：（1）空储液罐的多波现象在无初始几何缺陷时依然存在，而且出现在低阶振型中；（2）在罐的总体振型中存在有同波异向振型（cos，φ〓≠0）；（3）罐类的总体振型由轴对称和非轴对称振型组成，并存在相应的正、斜振型矩阵。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。