Keystone correction
[电] 梯形校正
🧩 词语组成解析
keystone
[['ki:stəun]]
n. 拱顶石, 楔石, 重点
🗣️ 情景例句
I guess you're right.
说的也对。
Every heart has its own sorrow.
人人都有伤心处。
No, I don't think we have been.
不，我想没有。