The large central vacuoles often found in plant cells enable them to attain a large size without accumulating the bulk that would make metabolism difficult.

• 在植物细胞常可见到大型的位于中央的空泡，这些空泡可使细胞体积增大而无需细胞内容物的积存，因此这些积存现象不会引起代谢困难。