unfailingly
adv. 可靠地；无穷尽地；不倦地
例句
He was unfailingly polite to customers.
他对顾客永远都彬彬有礼。
《柯林斯英汉双解大词典》
His relations with colleagues, differences of opinion notwithstanding, were unfailingly friendly.
他与同事们尽管有意见分歧，但关系一直很融洽。
The recession has certainly come with more problems than Andrea anticipated, but she remains unfailingly optimistic.
经济衰退带来的问题当然比安德里亚预期的要多，但她始终保持乐观。
