VERB
渗透，潜入(地方、组织中等)
If people infiltrate a place or organization, or infiltrate into it, they enter it secretly in order to spy on it or influence it.
例句
Activists had infiltrated the student movement...
激进分子已经渗入到了学生运动中。
The street protests had been infiltrated by people bent on violence...
街头抗议的人群中已经渗入了一些倾向于暴力的人。