Keystone state
na. 宾夕法尼亚州的浑名\\n
🧩 词语组成解析
keystone
[['ki:stəun]]
n. 拱顶石, 楔石, 重点
🗣️ 情景例句
I couldn't agree with you more.
我完全同意你的说法。
Work harder.
再接再历。
It contained five large bars of chocolate and three bags of sweets!
里面装了5大块巧克力和3袋糖果！