Colleagues
n. 同事；同行（colleague的復數）
??? 情景例句
Thanks.
謝謝。
Happy landing.
祝您早安 注：是送行者向上飛機的人說的告別語。
Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back.
大家都知道，在墻壁或山腰附近發出的喊聲，就會聽到回聲。