为了得到苗条的身材，范妮尝试了许多方法，但都是徒劳的。所以现在她晚饭什么也不吃了。

To get a slim figure, Fanny has tried many ways, but in vain. So now she is reduced to not eating anything for supper.

youdao

然而，每当我回过头来看这一切时，正是这些失败的经历教会我哪些尝试是有用的，哪些是徒劳的。

But looking back on it, it was the failed attempts that taught me the most about what works and what doesn't.

youdao

我将在明天的文章中谈到理解是如何被高估的，为何尝试强迫家人理解你是徒劳的。

I'll cover this in tomorrow's post where I'll show you how overrated being understood really is and why it's futile to try and squeeze it out of your family members.

youdao

Second of all the motif of guards who block access to the tree of life suggests that no humans have access to immortality and the pursuit of immortality is futile.

第二点，那些阻止人类接近生命树的守卫,暗示着，任何人类关于永生的尝试,最后都是徒劳一场。

耶鲁公开课 - 旧约导论课程节选

He beat on it and beat on it but it didn't make any sound."

他一遍又一遍地尝试,不过当然是徒劳“

耶鲁公开课 - 1945年后的美国小说课程节选

So, hunger sets in and it becomes extremely sad and tragic, and attempts to break out simply don't work; but, it had its light moments, and I can never resist those.

饥饿来临,一切都变得如此悲惨,而尝试逃跑只是徒劳,但这其中也有些趣事发生,我对这些逸事总是没抵抗力

耶鲁公开课 - 1871年后的法国课程节选