Variational notation
[计] 变分记号
🧩 词语组成解析
a. 变异的
🗣️ 情景例句
Who?
谁啊？
One foot is better than two crutches.
一只脚胜过两根拐杖。
After that day they were separated, never to see each other again.
那日一别，他们再没重逢。