The smallest structural unit of an organism that is capable of independent functioning,consisting of one or more nuclei,cytoplasm,and various organelles,all surrounded by a semipermeable cell membrane.

• 细胞生物内最小的能够独立发挥作用的结构单位，包括一个或多个细胞核、细胞质和各种细胞器官，均由具半透性的细胞膜包着