2 sentences

1. 他挺起胸膛向前走去。

   tā tǐng qǐ xiōng​táng xiàng​qián zǒu​qù.

   He puffed out his chest and walked forward.

   Source: Dong Chinese Dictionary

2. 他的胸膛非常宽阔。

   tā de xiōng​táng fēi​cháng kuān​kuò.

   He has a very broad chest.

   Source: Dong Chinese Dictionary