a. 不衰的, 不屈不挠的, 不松懈的
s showing sustained enthusiastic action with unflagging vitality
s unceasing
以上参考资料就是本词典详细汇总的词语unflagging是什么意思的翻译解释，如有错漏请向我们提供反馈意见。
Yet another billetdoux from your unflagging suitor.
又是一封你那位不屈不挠的追求者写的情书
And that's entirely due to your unflagging loyalty, hard work and tenacity.
而这全仰仗你们始终不渝的忠诚 辛勤努力和不屈不挠