He looked relaxed and totally in command of himself.

他看起来很轻松，有绝对的自信完全能控制住自己。

For the first time in years, she felt in command of her life.

多少年来第一次，她觉得生活掌握在自己的手里。

Who is in command of our navy?

谁指挥我们的海军？

Youll feel in command of your English.

你会觉得你的英语运用自如。

He was placed in command of the Second Army.

他被任命指挥第二军团。