Keystone shaped
[电] 梯形
🧩 词语组成解析
keystone
[['ki:stəun]]
n. 拱顶石, 楔石, 重点
a. 成某种形状的, 制成一定形状的, 有某种形状的, 合适的, 计划好的, 有目标的\\n[医] 具形的, 形似的
🗣️ 情景例句
But first in the school-rooms.
但首先是在教室 。
I heard you'd been sick.
听说你身体不舒服。
'Dear me,' she said.
“天啊，”她说，