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
My wife wanted me to say thanks to you for your gift last time.
我妻子要我带她谢谢你上次送的礼物。
We can live without our friends, but not without our neighbours.
生活可无友，邻居不能无。
The day after tomorrow will be sunny.
后天转晴。