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。
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.
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。
Insect melanism is one of the common polymorphism in nature, and has become classical study system for species evolution and adaptability.
本文阐述了世界笠扁蜡蝉属分类研究的历史与现状，并从笠扁蜡蝉属的多型现象入手讨论了这个类群特异的形态特征。
Studies on Systematics and Phytogeny of Genus Trypetimorpha in the World I. The Study History and Morphological Characters of Genus Trypetimorpha C.
与Bechamp同时代的ClaudeBernard同样论述了多型现象，并认为内环境而非致病菌才是导致疾病的原因。
Another of Béchamp's contemporaries, Claude Bernard, expounded on the pleomorphic theory and said that the inner terrain or "milieu interieur" was the cause of disease, and not microbes.
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；
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;
甘蓝型油菜属于常异花授粉植物，一般认为自交不会产生衰退现象，但多代连续自交对甘蓝型油菜究竟有何影响鲜见报道。
Brassica napus L. is an often cross-pollinated plant, and is not generally considered selfing recession, but it was little reported about effects of selfing on main traits of Brassica napus L.
甘蓝型油菜属于常异花授粉植物，一般认为自交不会产生衰退现象，但多代连续自交对甘蓝型油菜究竟有何影响鲜见报道。
Brassica napus L. is an often cross-pollinated plant, and is not generally considered selfing recession, but it was little reported about effects of selfing on main traits of Brassica napus L.
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