plasma membrane

例句：

1. 1. The researchers found that the plasma membrane plays a crucial role in cell communication.
   研究人员发现，等离子体膜在细胞通信中起着至关重要的作用。
2. 2.The plasma membrane is responsible for protecting the cell from external threats.
   等离子体膜负责保护细胞免受外部威胁。
3. 3. The plasma membrane is a dynamic structure that constantly changes shape and size to adapt to the needs of the cell.
   等离子体膜是一个动态的结构，不断改变形状和大小以适应细胞的需求。