Ech
abbr. echelon 梯形，梯次编队
🗣️ 情景例句
You should take the number 1 subway.
应当搭一路地铁。
We need them urgently.
我们急需这些资料。
I tried to say something, but my mouth was full of cotton wool.
我想说点什么，但我嘴里塞满了药棉。