a feather in his( her)cap

意:值得夸耀(骄傲)的事;卓越的成就;荣誉的标志
例:If he clinches this deal, that'll really be the feather in his cap!
如果他能做成这笔交易,那才真正值得他骄傲呢!

It was a real feather in his cap for the new teacher when he was made head of the English department.
被任命为英语系主任,这对那位新教师来说真是件值得骄傲的事。