I have already acquired experience in the tourism field through various internships.

acquired 是动词 acquire 的过去分词形式。acquire 由前缀 ac-（表示"加强"）和词根 quire（来自拉丁语 quaerere，意为"寻求、获得"）组成，意思是"通过努力获得或掌握（知识、技能等）"。在句中表示已经完成的动作。