cell membrane

例句：

1. 1. The cell membrane is the thin layer that separates cells from each other.
   细胞膜是分隔细胞与细胞之间的薄层。
2. 2. Cell membranes are responsible for filtering out substances that are harmful to the cell.
   细胞膜负责过滤掉对细胞有害的物质。
3. 3.The cell membrane is made up of phospholipids and proteins, which help to maintain the integrity of the cell.
   细胞膜由磷脂和蛋白质组成，有助于维护细胞的完整性。