when you feel upset or when you feel frustrated that something is not going the way that you wish it would.

当你觉得很失落，或者当你因为事情不像你期望的那样进展而感到沮丧时，你也可以使用这个句型。

I'm frustrated 课堂 - SpeakingMax英语口语达人

So, remember all of the little subcommunities that she interacts with have some sort of pain or loss associated with them: the Inamorati Anonymous for example, people who don't want to love.

所以，记住，和她有过相互影响,的那些小区，都有着一定的,痛苦和失落感：,拿“匿名的Inamorati“做例子，那些人不想去爱。

耶鲁公开课 - 1945年后的美国小说课程节选

After you part ways, you can turn to your friend and express your frustration that he did not remember you.

你们分开后，你可以向你的朋友表达他不记得你的失落感。

I'm frustrated 课堂 - SpeakingMax英语口语达人

If he hadn't run, Beatrice would still have won, but it would still have cost him the $.20 of unhappiness at Beatrice winning, but at least he would have saved himself the C of running.

如果他不参选,比阿特丽斯还是会获胜,这同样会给他带来,20美分的,比阿特丽斯获胜的失落感,但至少他节约了参选要支付的C

耶鲁公开课 - 博弈论课程节选