Operational key
[计] 操作键
🧩 词语组成解析
key
[kiː]
n. 钥匙;（打字机等的）键;关键，线索，秘诀;（音乐的）调;
vt. 键入;锁上;调节…的音调;提供线索;
vi. 使用钥匙;
adj. 关键的;主要的;
🗣️ 情景例句
You'll never guess what happened the other day!
你永远也猜不到前几天发生什么事了！
Many receive advice only the wise profit by it.
聆忠言者众，智者独获益。
I've just called the Frist Aid Centre.
我刚才已经给急救中心打了电话。