un·err·ing /ˌʌnˈɛrɪŋ, ˌʌnˈɚ/
(a.)有錯的,無過失的,沒有打歪的
Un·err·ing a. Committing no mistake; incapable or error or failure certain; sure; unfailing; as, the unerring wisdom of God.
Hissing in air the unerring weapon flew. --Dryden.
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unerring
adj : not liable to error; "the Church was...theoretically
inerrant and omnicompetent"-G.G.Coulton; "lack an
inerrant literary sense"; "an unerring marksman" [syn:
inerrable, inerrant]