2 sentences

1. 昂首挺胸。

   áng shǒu tǐng​xiōng.

   Hold your head high and puff out your chest.

   Source: Dong Chinese Dictionary

2. 战士们精神抖擞，昂首挺胸地走过检阅台。

   zhàn​shì men jīng​shén​dǒu​sǒu, áng​shǒu tǐng​xiōng de zǒu​guò jiǎn​yuè​tái.

   The soldiers, full of spirit, marched past the reviewing stand with their heads held high.

   Source: Dong Chinese Dictionary