Ech
abbr. echelon 梯形，梯次编队
🗣️ 情景例句
Here's my ticket and seat assignment.
这是我的机票和座位号。
The secret of wealth lieth in the letters SAVE.
节俭是致富的秘诀。
The Ambassador's wife went on asking questions, when she suddenly noticed a big hole in her husband's hat.
大使夫人继续提出问题，她突然又发现丈夫的帽子上有个洞。