为什么蜜蜂的巢室是六边形呢？
鳞状细胞癌，癌组织有由多边形细胞组成的癌巢，多边形细胞边界清楚，胞质为粉红色。细胞核染色深，形状有角。
This is the microscopic appearance of squamous cell carcinoma with nests of polygonal cells with pink cytoplasm and distinct cell borders. The nuclei are hyperchromatic and angular.
晚成性幼雏留巢时间的长短也不相同：雀形目鸟类与孵卵日期大致…
To stay late into the nest of chicks is not the same length: passerine birds and hatchery date generally …
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