长在肉内

例句：

1. 1. The spy infiltrated the enemy's headquarters to gather intelligence.
   间谍潜入敌方总部搜集情报。
2. 2.The thief infiltrated the bank and stole millions of dollars.
   小偷潜入银行并偷走了数百万美元。
3. 3.The new drug was designed to infiltrate the body and treat diseases.
   新药被设计用来渗透身体，治疗疾病。