tirelessly
adv. 不知疲倦地；不屈不挠地
例句
Her secretaries work tirelessly for a pittance.
她的秘书们为了一点微薄的工资不知疲倦地工作。
《柯林斯英汉双解大词典》
He worked tirelessly for the cause of health and safety.
他为健康和安全事业孜孜不倦地工作。
Mark is a bit annoying in talking tirelessly about it.
马克喋喋不休地谈论这个问题，有点令人讨厌。
