In English we talk about a 'bunch of keys', meaning a group of keys which are attached together. The group noun 'bunch' is also used for things like bananas and flowers when they are fastened together in a tight group.
A bunch of keys 意思是一串鑰匙。Bunch 是個集合名詞表示一串、一束、一捆或一簇什麼東西，比如一串香蕉 a bunch of bananas, 一束鮮花 a bunch of flowers 等等。
短語 keyed up 形容一種狀態，表示激動萬分的、緊張不安的。這個短語常和單詞 about 連用。
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.
短語 the key to something 意思是成就某事的關鍵。比如幸福的關鍵 key to happiness 是什麼？致富的關鍵 key to wealth 是什麼？
The key to happiness is accepting that you can't change everything.