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
I had a busy day. I'm done.
我今天很忙，现在精疲力尽。
You think I was born yesterday!
我没那么笨！又不是三岁小孩。
The noise pollution survey revealed a rather spurring and possibly amusing old fashioned source of noise.
这个有关噪音的污染调查还揭示了一种出人意外而同时可能会引人意外而同时可能会引人发笑的老式噪音源。