Mnemocode
[计] 助记码, 记忆符
🗣️ 情景例句
What did I do with them?
我把它们放在哪儿了？
Math is beyond me.
我对数学无能为力。
So was born the echo-sounding apparatus, now in general use in ships.
这样就产生了目前各种船舶上普遍应用的回声探测仪。