Valid prefix
[计] 有效前缀
🧩 词语组成解析
prefix
['pri:fiks]
n. <语>前缀;人名前的称谓;前置代号（置于前面的单词或字母、数字）;
🗣️ 情景例句
It's no use crying over spilt milk. What's done cannot be undone.
覆水难收。
What a shame! Or That's too bad.
真是遗憾。
Come in, please!
请进！