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
then I've got to do some thinking about
那么我就必须考虑考虑
A thousand friends are few, one enemy is too many.
朋友千人尚觉少，仇敌一人犹嫌多。
We are good friends.
我们是好朋友。