This is ambition for a career, but it's also a desire for personal autonomy. For Frost, poetry is invested with a longing for autonomy in, well, both simple and complex senses.

这是事业心，也是一种,个人自由的渴望，对他来说，诗歌是,结合了自由的渴望，呈现出一种既简单又复杂的感觉。

耶鲁公开课 - 现代诗歌课程节选

It's really the simplest way to express this emotion of frustration

这是表达沮丧感觉的一种最简单的方式。

I'm frustrated 课堂 - SpeakingMax英语口语达人