短语 keyed up 形容一种状态，表示激动万分的、紧张不安的。这个短语常和单词 about 连用。
- I'm really keyed up about the show tonight.
- You've been keyed up all morning, Clive. You should take some time to relax before your exam.
值得注意的是，短语 the key to something 意思是成就某事的关键。比如幸福的关键 key to happiness 是什么？致富的关键 key to wealth 是什么？
- The key to happiness is accepting that you can't change everything.
