Echelons
n. （机构中的）等级, 阶层( echelon的复数形式 ); （军舰、士兵、飞机等的）梯形编队
🗣️ 情景例句
Of course. It's on the fifth floor of Building No.4. Let's go there.
当然可以。展室在四号楼五层，我们上去吧。
I asked him to come with me , but he wouldn't.
我请他和我一起来，但是他不肯。
I only have small boxes.Do you want one?
我只有小盒的。您要一盒吗？