Effectivity
n. 有效, 功效
🗣️ 情景例句
I type about 40 words per minute.
一分钟我能打40个字。
What we learn with pleasure we never forget.
乐意学的东西决不会忘记。
I don't want to know what it's been; I want to know what it is now.
我不想知道它曾经是什么；我想知道它现在是什么。