sandwich type cell

例句：

1. 1. The sandwich-type cell is a popular choice for protein bars.
   三明治型细胞是蛋白棒的热门选择。
2. 2.The sandwich-type cell has been shown to improve the immune system.
   三明治型细胞已被证明能提高免疫系统。
3. 3.The sandwich-type cell is often used in biotechnology research.
   三明治型细胞常用于生物科技研究。