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
Yes, I know, but he'll get over it.
是的 我知道 过一下就会好的。
His heart cannot be pure whose tongue is not clear.
嘴不净者心不纯。
The students are going to take the test in two days' time.
学生们准备在两天后就接受测验。