Variational notation
[计] 变分记号
🧩 词语组成解析
a. 变异的
🗣️ 情景例句
Are you sending it by regular or by speed?
你要寄平信还是快递？
Can this radio receive short-wave?
这个收音机能收短波吗？
You're eating too much!
你吃得太多！