成天受嘲讽是很令人泄气的。

It's very discouraging to be sneered at all the time.

《新英汉大辞典》

尼采描述的令人泄气的孤独，压迫著我。

The discouraging loneliness he described oppresses me.

youdao

尽管菲比耐心十足——我和莎莉也如此——此行中令人泄气的时刻还是不少。

Patient as Phoebe was—as we all were—there were plenty of discouraging moments along the way.

youdao

We'll about what individuals can do, what a country can do, what the world can do to help change what are really pretty discouraging numbers.

我们会谈到个人能做些什么,国家能做些什么,世界又能做些什么,去帮助改变这些,令人泄气的数据

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

I'm frustrated that I can't concentrate on my homework.

我没法把注意力集中在我的作业上，真令人泄气。

I'm frustrated 实战 - SpeakingMax英语口语达人