它们学会了按数量多少对几组物品进行排列，每组都包含了一个、两个或三个不同形状和大小的物品。
They learned to rank groups of one, two and three items in various sizes and shapes.
菖蒲属叶上下表皮特征基本一致，细胞形状为长方形或近菱形，气孔器平列型，成纵行与叶脉平行排列；
In Acorus both upper and lower epidermis cells are rectangle or rhombus, and the stomata apparatus are paracytic and arrange in rows along the veins.
对染色体分类根据染色体的排列，数目，大小，形状或其它特点划分并排列(有机体或物种的染色体配对物)。
To classify and array (the chromosome complement of an organism or a species) according to the arrangement, number, size, shape, or other characteristics of the chromosomes.
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