His mind is full of the angst for his future.

他心里充满了对未来的忧虑。

This report examines the angst of teenagers.

这份报告研究了青少年的焦虑问题。

I am looking for a way to relieve my angst.

我正在寻找减轻焦虑的方法。

As a child, I had a lot of angst about starting new activities or meeting new people.

年少时，我对开始新的活动或认识新的人有很多担心。

His angst made him defensive and he'd often snap at his parents and counselors whenever they asked about his schoolwork.

他的忧虑使他抱有很强的戒备心，每当父母和辅导员问起他的功课时，他经常大发雷霆。

Many kids suffer from acne and angst.

许多孩子深受粉刺和焦虑之苦。

"What if there's nothing left at all?" he cried, lost in some intense existential angst.

“要是什么都没了会怎样？”他大叫起来，迷失在某种强烈的攸关人类存亡的痛苦中。

Reason for my angst?

我焦虑不安的理由？

Perhaps it was no more than "teen angst".

或者也许那仅仅只是“青春期焦虑”。

Not for nothing is Angst a German word.

仅仅只是为了一个德国的词汇：不放心。