adj.不犯错误的；一贯准确的；万无一失的
The antique dealer has an unerring ability to spot a fake. 那古董商慧眼识珠，鉴别假货从不出错。
You can trust his unerring taste in cloths. 你可以相信他的衣着品位，绝对没问题。
He have an unerring knack of saying the wrong thing. 他有个出言必失的本事。
adv.无过失地；正确地
