指挥官决定在黎明时分发动进攻。

The ___commander decided to launch the attack at dawn.

那位将军被任命为部队的指挥官。

The general was named the ___commander of the troops.

这位指挥官负责整个区域的治安工作。

The ___commander is responsible for the security of the entire district.

飞机指挥官在起飞前做了最后的检查。

The ___commander of the aircraft performed the final checks before takeoff.