adj.永恒的；無(wú)窮的；可靠的

Their discipline and good behaviour was unfailing. 他們的紀(jì)律和良好行為始終如一。

She fought the disease with unfailing good humour. 她始終抱樂(lè)觀態(tài)度同疾病斗爭(zhēng)。

Nature is always an unfailing fountain of inspiration. 大自然永遠(yuǎn)是靈感的泉源。

Everyone admired her patience and unfailing good humour. 人人都佩服她的耐心和永不衰減的好脾氣。

adv.無(wú)窮盡地；可靠地；不倦地