adj.蓬勃的，不松懈的，不减弱的，不倦的

She maintained an unflagging enthusiasm for her work, despite the long hours.
她对工作的热情始终如一，尽管工作时间很长。
His dedication to the project was unflagging, and he never gave up on his goal.
他对项目的投入毫不松懈，从未放弃过目标。
The marathon runner's stamina was truly unflagging as he crossed the finish line.
马拉松选手的耐力在冲过终点线时仍然坚韧不拔。
Her unwavering optimism in the face of adversity was an unflagging source of inspiration.
她在逆境中坚定不移的乐观精神是一个持久的激励源泉。
The team's morale remained unflagging even after several consecutive losses.
即使连续输了几场比赛，团队的士气依然高昂。
His relentless pursuit of knowledge was an unflagging characteristic that set him apart.
他无止境地追求知识是他与众不同的显著特征。
Despite the setbacks, her commitment to the cause remained unflagging.
尽管遭遇挫折，她对事业的承诺依然坚定不移。
The volunteer's energy and enthusiasm were an unflagging beacon of hope for the community.
志愿者的能量和热情是社区持续不断的希望之光。
Unflagging curiosity drove him to explore every new scientific discovery.
他那永不减退的好奇心驱使他探索每一个新的科学发现。
His unflagging creativity led to innovative solutions in his field.
他在领域的创新解决方案源自他永不枯竭的创造力。