在英语中，表示 "他不怕艰苦" 的常用表达有：
He is not afraid of hard work. 他不怕辛苦工作。
He is not intimidated by hardship. 他不会因艰辛而畏缩。
He is not daunted by difficulty. 他不会因困难而气馁。
He is not discouraged by adversity. 他不会因逆境而灰心。
下面是一些英文例句：
He's always been a hard worker and never afraid of putting in the extra hours. 他一直是个勤奋的工人，从不害怕加班。
Despite the challenges, she remained determined and refused to be intimidated by the difficulty of the task. 尽管有挑战，她仍然坚定不移，不会因任务的困难而畏缩。
He faced a lot of setbacks, but he never let adversity get him down. 他遇到了很多挫折，但从不让逆境打垮他。
He is not afraid of hard work. 他不怕辛苦工作。
He is not intimidated by hardship. 他不会因艰辛而畏缩。
He is not daunted by difficulty. 他不会因困难而气馁。
He is not discouraged by adversity. 他不会因逆境而灰心。
下面是一些英文例句：
He's always been a hard worker and never afraid of putting in the extra hours. 他一直是个勤奋的工人，从不害怕加班。
Despite the challenges, she remained determined and refused to be intimidated by the difficulty of the task. 尽管有挑战，她仍然坚定不移，不会因任务的困难而畏缩。
He faced a lot of setbacks, but he never let adversity get him down. 他遇到了很多挫折，但从不让逆境打垮他。