Impractically dressed..because of her unfailing optimism about the weather.
出自: M. RobertsHis..unfailing politeness made him much admired.
出自: S. Hastings"a foolproof identification system"
"the unfailing sign of an amateur"
"an unfailing test"
"an unfailing source of good stories"
"a subject of unfailing interest"
"unfailing loyalty"
"unfailing good spirits"
"unflagging courtesy"