P1 phage

例句：

1. 1. The phage is designed to destroy bacteria in the body.
   这种病毒被设计来破坏体内的细菌。
2. 2. The phage has been found to be effective against certain types of cancer cells.
   这种病毒被发现对某些类型的癌细胞有效。
3. 3. Phages are a natural part of the human body's immune system.
   噬菌体是人类免疫系统的自然组成部分。