Keystone effect
[电] 梯形效应
🧩 词语组成解析
keystone
[['ki:stəun]]
n. 拱顶石, 楔石, 重点
🗣️ 情景例句
I bought it in an antique shop
我在一家古董店买的，
I've always tried not to interfere in your affairs.
我总是尝试不干预你的私事。
Mrs.Sterling got so angry that she ran after them.
斯特林夫人非常气愤，向着他们追了过去。