1. 不疲倦的：tiredness 疲劳 | tireless 不疲倦的 | tirelessly 不知疲倦地
2. 不易疲劳的：tire out 十分疲劳 | tireless 不易疲劳的 | tissue 组织
1. 不知疲倦的;坚韧的
If you describe someone or their efforts as tireless, you approve of the fact that they put a lot of hard work into something, and refuse to give up or take a rest.
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e.g. He was a tireless worker for justice.
他是个为了正义不知疲倦地工作的人。
e.g. ...Mother Teresa''s tireless efforts to help the poor.
德肋撒修女孜孜不倦帮助穷人的努力
adj
1. characterized by hard work and perseverance
Synonym: hardworkingindustriousuntiring
2. showing sustained enthusiastic action with unflagging vitality
e.g. an indefatigable advocate of equal rights
a tireless worker
unflagging pursuit of excellence
Synonym: indefatigableunflaggingunwearying