standard-bearer
noun [ C ] uk/ˈstæn.dədˌbeə.rər/ us/ˈstæn.dɚdˌber.ɚ/
旗手，领袖
the person or thing that seems to lead a group of people having similar ideas or moral opinions
Mr Everhart wants Caltech to be the standard-bearer for excellence in scientific research of all kinds. 艾弗哈特先生想使加州理工学院成为各项科学研究的翘楚。