be under orders meaning in English

奉令

He is under order to leave from finland .
他奉令调离芬兰。
The fleet is under orders to set sail .
舰队奉命出发。
The airmen were under orders to abort their mission if on-board equipment showed the slightest glitch .
飞行员事先接到命令，如果机载装备发生哪怕一点点的故障，也要取消所执行的任务。
The regimental adjutant came in and confirmed the news brought by zherkov . they were under orders to advance next day
兵团团部的副官来了，他证明热尔科夫带来的消息是可靠的。
Potemkin , " i apologize . however , i cannot back down . the red musician who lurks beyond here . . . i am under orders to arrest her .
抱歉，不过我不能让开。潜藏在这里的红衣乐师. . .我收到命令要逮捕她。