1. Good words

1. Brave and fearless: Describes a person who is brave and fearless, not afraid of hardships and dangers, and not afraid of difficulties.

2. Unswerving: Describes a firm belief that is unwavering.

2. Good sentences

1. "They faced difficulties and obstacles without fear, perseverance, and moved forward bravely."

2. "They used their lives and blood to compose magnificent pieces of music, demonstrating the indomitable spirit of mankind."