3 sentences

1. 他不畏艰辛，勇往直前。

   tā bù wèi jiān​xīn, yǒng​wǎng​zhí​qián.

   He fears no hardships and presses forward courageously.

   Source: Dong Chinese Dictionary

2. 他不畏权势，坚持揭露真相。

   tā bù wèi quán​shì, jiān​chí jiē​lù zhēn​xiàng.

   He was not afraid of power and influence and insisted on revealing the truth.

   Source: Dong Chinese Dictionary

3. 他在电影里塑造了一个不畏艰险的硬汉形象。

   tā zài diàn​yǐng lǐ sù​zào le yī gè bù wèi jiān​xiǎn de yìng​hàn xíng​xiàng.

   He portrayed a 'tough guy' who fears no danger in the movie.

   Source: Dong Chinese Dictionary