Well, a fair definition of tickling is touching parts of the body in a mock attack.

胳肢的准确定义就是,打打闹闹时碰身体某个地方。

耶鲁公开课 - 心理学导论课程节选

A problem with adenoviruses is that your immune system recognizes them, and if your immune system recognizes the virus then it can attack the virus and eliminate it from the body.

关于腺病毒有个问题,免疫系统会识别腺病毒,如果免疫系统识别了这些病毒,就会进而攻击并从体内清除病毒

耶鲁公开课 - 生物医学工程探索课程节选