The process by which a cell divides to form two daughter cells. Upon completion of the process, each daughter cell contains the same genetic material as the original cell and roughly half of its cytoplasm.细胞分裂：一个细胞分裂成两个子细胞的过程。这一过程结束时，每一个子细胞都含有与原细胞相同的遗传物质及几乎为原细胞一半的细胞质