a knight in shining armour meaning in English

[网络] 身穿闪亮盔甲的骑士；白马王子；甲骑士

while i was establishing the business the bank manager really was a knight in shining armour
当我刚开始经商时，银行的经理确是我的恩人。
once upon a time there was a princess that lived a lonely, single girl's life until a handsome prince on a white horse ( a knight in shining armour would also have been acceptable ) came along, married her and they lived happily, in marital bliss, every after
从前有一位公主,过着寂寞的单身少女生活,直到一位骑着白马的英俊王子(身着亮甲的骑士也可以接受)出现,迎娶了她,从此他们过着幸福的生活,相亲相爱。