excellence

HF 螺旋型调焦(Helical Focus)：这类镜头镜头前端不转动，方便使用定制的遮光罩和偏振镜。EX优秀(EXcellence)：属于专业类镜头，特征是镜筒为EX涂层和有EX得标。^[1]

1. Hehasbeenameticulousmanager,amanagerparexcellence.他是个十分细心的经理，出类拔萃的经理。
2. Thereisaperniciouscultureofexcellence:everythinghastobenotmerelygoodbutthebest.对于优秀存在着一种认识的误区：一切都务求最好。
3. Hisrecordofacademicexcellencecontinuedthroughcollege.他大学时代成绩一直全优。
4. Itbecamedifficulttopromoteexcellencewithoutbeingaccusedofelitism.提倡追求杰出难免被指责为宣扬精英论。^[1]