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
It is. Come on out to the patio.
的确如此。请到院子里来吧。
Life is short and time is fleeting.
人生短暂，光阴易逝。
It is not uncommon to hear that a shipping company has made a claim for cost of salvaging a sunken ship.
航运公司为打捞沉船而提出索赔，这是常有的事，