unflagging是什么意思

音标:英 [.ʌn'flægiŋ]

a. 不衰的, 不屈不挠的, 不松懈的

s showing sustained enthusiastic action with unflagging vitality
s unceasing

unflagging的用法和例句：

1. 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

2. 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