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
Now stand up, please.
现在站起来。
We've got to report back to the head office.
我们还要回去向总部汇报情况呢。
Like his father, he was driving a car called Bluebird.
同他父亲一样，他也驾驶着一辆名叫“蓝鸟”的汽车。