fad

1. N-COUNT You use fad to refer to an activity or topic of interest that is very popular for a short time, but which people become bored with very quickly. 一時(shí)的狂熱

Hamnett does not believe environmental concern is a passing fad. 哈姆內(nèi)特不相信對(duì)環(huán)境的關(guān)注是一時(shí)的狂熱。