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
and a good night's sleep.
睡一个好觉。
How did you break your leg?
你怎么弄断了腿？
So great is our passion for doing things for ourselves, that we are becoming increasingly less dependent on specialized labour.
现在我们自己动手做事的热情很高，结果对于专业工人的依赖越来越少了。