adj.不知疲倦的；不懈的；不屈不挠的
Satisfaction of customers is just our untiring pursuit! 顾客的满意是我们不懈的追求！
Strive for further development with untiring efforts. 以不懈的努力追求更广阔的发展。
He appeared before me, not as the untiring and incomparable socialist agitator, but as a man of learning. 在我面前出现的他，并不是一位不屈不挠的和无与伦比的社会主义鼓动家，而是一位学者。
