Ech
abbr. echelon 梯形，梯次編隊
??? 情景例句
I agree. I appreciate your helping me, Jack.
我同意，謝謝你的幫助杰克。
I've been part of this project since its beginning.
從一開始我就參與這個計劃。
Whatever the source of noise, one thing is certain: silence, it seems, has become a golden memory.
看來寂靜已變成一種珍貴的回憶。