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
How many stops will the train make on the way?
路上火车停几站？
Speak of angels and you will hear their wings.
说到曹操，曹操就到。
Who do you make them for?
你做机器干什么呢？