translation.en: The normal cell, if you looked at it under the microscope, would have a nucleus sitting in the middle of the cell, which is nice and round and smooth in its boundaries and it looks kind of like that.
translation.zh: 这个正常的细胞，如果你们在显微镜下看， 会看到细胞中间有细胞核。 漂亮的圆形，边缘光滑。 它看起来就像这样。