/preɪ ||; pre/verbprey on sb's mind to cause sb to worry or think about sth 使忧虑；使困扰: The thought that he was responsible for the accident preyed on the train driver's mind. 火车司机认为意外事件自己有责，内心终日惴惴不安。 prey on sth (used about an animal or bird) to kill and eat other animals or birds （指动物或鸟类）捕食: Owls prey on mice and other small animals. 猫头鹰捕食老鼠和其他小动物。