often a biologist can discriminate between different kinds of cells that they see in section of a tissue for example, merely by its shape and the characteristics that it has.

生物学家经常可以在组织切片上,仅凭所看见的细胞形状来区分不同细胞,如果举例来说的话,仅通过细胞的形状和特性就足够

耶鲁公开课 - 生物医学工程探索课程节选

A section of DNA that is responsible for encoding a gene, let's say it's the insulin gene for example, might be some stretch of DNA on a certain chromosome inside your cells, inside the cells of the pancreas.

一段编码蛋白的DNA序列,我们就拿编码胰岛素的基因来举个例子,它也许是一段DNA基因序列,位于你胰腺细胞里的,某条染色体上

耶鲁公开课 - 生物医学工程探索课程节选