1、He is leader of the Nation and Commander in chief of the Armed Forces.
他是國(guó)家最高領(lǐng)導(dǎo)人和美軍三軍總指揮。

2、The commander in chief of all the armed forces in certain countries
大元帥某一國(guó)內(nèi)所有武裝部隊(duì)的最高統(tǒng)帥

3、The commander in chief took the salute of the military review.
那位總司令在閱兵式上接受敬禮。