adj.不知疲倦的；不屈不撓的

The indefatigable bell now sounded for the fourth time. 那不知疲倦的鐘聲如今敲第四遍了。

He was indefatigable in his lectures on the aesthetics of love. 在講授關于愛情的美學時，他是不知疲倦的。

Encouraged by this discovery, Edmond determined to assist the indefatigable laborer. 在這個發(fā)現(xiàn)的鼓舞之下，愛德蒙決心要幫助那個不屈不撓的勞動者。