There are pink, yellow and white beets, and beets with circles of red and white inside.

VOA: special.2010.03.02

They're red because they contain a special protein called hemoglobin which is very concentrated inside the cell.

红细胞的红色源于,其内部一种叫做血红蛋白的特殊蛋白质,血红蛋白在细胞内的浓度很高

耶鲁公开课 - 生物医学工程探索课程节选

Inside the head it's bright red because it's pulsing with blood.

在颅内的时候,它是鲜红色的,因为它充满了鲜血

耶鲁公开课 - 心理学导论课程节选

Inside lay Roaring Camp's newest citizen, wrapped in a piece of bright red cloth.

VOA: special.2009.06.06